• Berkshire Hathaway Energy Company / Pacificorp v. Birchtech Corp.Institution denied
  PTAB · May 18, 2026 · IPR2025-00278 · APJ David Cotta · IPR · Institution

  The Board denied institution of Berkshire Hathaway Energy Company and PacifiCorp’s petition because it had instituted the earlier-filed IPR2025-00274 challenging the same patent.

  RulingsInstitution decision

  • PTAB / AIA Trials › Real party in interest / privityRpi dispute resolved for petitionerDecided for petitioner

    “request from Patent Owner for Director Review, finding that Patent Owner introduced “evidence sufficient to put RPI and privity at issue” and remanding with instructions to “allow discovery, narrowly tailored to resolve the RPI and privity issues” including “at least materials sufficient to clarify the evidence the Board found to be ‘ambiguous’ and to avoid the need for the Board to ‘speculate as to the nature of the redacted material.’” Paper 57 (Decision on Request for Director Review). The Director instructed that after allowing such discovery, we “should then determine on the full record whether Petitioners have met their burden of demonstrating that the Petitions are not time-barred under § 315(b), applying the framework set forth in Worlds Inc. v. Bungie, Inc., 903 F.3d 1237, 1242–44 (Fed. Cir. 2018). Concurrently herewith, we issue a decision in IPR2025- 00278 finding that Petitioner has met its burden of demonstrating that its Petition is not time-barred under 35 U.S.C. § 315(b).” slip op. at 2

  • Other 314aInstitution denied discretionary otherInstitution denied

    “Review Decision instructing that “if the Board determines that Petitioners met their burden to identify all RPIs in the Petitions, then the Board should maintain at most one IPR challenging each of the ’114 patent, the ’517 patent, the ’430 patent, and the ’225 patent.” Paper 79, 3. Together with its Petition in this proceeding and the proceeding in IPR2025-00274, Petitioner filed an Explanation Regarding the Necessity of Multiple Petitions. Paper 2 (“Explanation”); IPR2025-00274, Paper 2. In the Explanation, Petitioner “request[s] that, if the Board uses its discretion to institute the Petitions, the Board consider the merits of IPR2025-00274 . . . before IPR2025-00278.” Explanation, 3. Further to Petitioner’s request, we first considered the merits of IPR2025-00274. For the reasons discussed in our concurrently issued decision in IPR2025-00274, we institute inter partes review on the grounds set forth in the Petition in IPR2025-00274. Further to the Director’s instruction that we “maintain at most one IPR challenging . . . the ’114 patent,” and the Petitioner’s request that we consider the merits of IPR2025-00274 before IPR2025-00278, we deny institution of the Petition in this proceeding.” slip op. at 3

  Discretionary denial
  Patents in suitUS 10,343,114
• Fluidmaster, Inc. v. Danco, Inc.All claims unpatentable
  PTAB · Mar 11, 2026 · IPR2024-00635 · APJ Meredith C Petravick · IPR · Final written decision

  The majority held claims 1–14 unpatentable under §103 over Guoxin, Ho, and the Quick Connection Art; one judge dissented as to claims 8, 9, 12, and 13.

  RulingsFinal written decision

  • Skill levelSkill level patent owner adoptedDecided for patent owner

    “A person of ordinary skill in the art (“POSITA”) with respect to the subject matter of the ’698 patent at the time of the priority date, March 11, 2004, would have had an undergraduate degree in mechanical engineering, or other technical training in product design or equivalent work experience. This person would also possess at least one year of experience in developing and/or evaluating mechanical aspects of fluid systems. I consider myself a person of ordinary skill in the art under this definition. Ex. 1004 ¶ 28. Patent Owner argues: A POSITA in the field to which the ’698 Patent is directed would have had at least a Bachelor of Science degree in mechanical engineering or a related field or, as a substitute, at least two years of work or research experience in the design or development of toilet products, parts, and accessories. PO Resp. 6. We adopt Patent Owner’s proposed definition of a POSITA, as it is consistent with the ’698 patent and the asserted prior art. See Okajima v. Bourdeau, 261 F.3d 1350, 1355 (Fed. Cir. 2001). However, we see no material difference between the level of skill proposed by Patent Owner and that proposed by Petitioner and Dr. Cameron such that our determinations would be the same under either proposed level of skill.” slip op. at 12

  • Claim Construction › Threshold & procedure › Whether a term needs construction (O2 Micro)Plain and ordinary meaningDecided for petitioner

    “Patent Owner asserts that, because each of the Flow Limitations relate to water flow through the bowl fill valve, these limitations require adjusting the flow rate of water exiting the flow valve. PO Resp. 15–17 (citing Ex. 2013 ¶ 97); See also PO Sur-Reply 7. Petitioner responds that “the claim language of the ’698 Patent discusses adjusting the water flow, not specifically the ‘flow rate.’” Pet. Reply 13. We are not persuaded by Patent Owner, and the conclusory testimony of Mr. Jobin (Ex. 2013 ¶ 97), that because the Flow Limitations “relate” to water flow through the bowl fill valve, that this necessarily means that the flow rate must be adjusted. As Petitioner points out, neither the term “flowrate” nor any similar term appears in any of the Flow Limitations. Thus, the plain language of the Flow Limitations requires that, contrary to Patent Owner’s position, the claim limitation should not be restricted to adjustments to “flow rate.”” slip op. at 14

  • Claim Construction › Intrinsic evidence (Phillips canons) › Plain and ordinary meaning to a POSITATerm construed petitioner constructionDecided for petitioner

    “Petitioner argues that Limitations 8B and 12B are directed to the configuration or structure of the bowl fill valve outlet port. Pet. Reply 2–4. According to Petitioner, because Limitations 8B and 12B do recite an overflow tube, the overflow tube is not separately claimed and is recited solely to define the function of the outlet port on the bowl fill valve. Id. at 3. Petitioner, thus, argues that an overflow tube is not separately claimed as a structural element, and that, to meet Limitations 8B and 12B, it is sufficient to show that the prior art discloses a bowl fill valve with an outlet port that is configured to attach directly to a tube that provides water from the outlet port to an overflow tube. Id. at 4. In contrast, Patent Owner argues that Limitations 8B and 12B separately claim the overflow tube, and that Petitioner must show that the prior art discloses a tube that transfers water from the bowl fill valve outlet port to the toilet tank overflow tube. PO Resp. 10–11; PO Sur-reply 2–3. We disagree with Patent Owner, because claims 8 and 12, on their face, require “bowl fill valve outlet port,” but do not require or recite an “overflow tube” as an element of the claimed “bowl fill valve.” When a structure is claimed as “configured to” perform a particular function, it generally requires a structure that is designed to perform the particular function claimed, i.e., it requires more than the mere capability of performing that function. See Aspex Eyewear, Inc. v. Marchon Eyewear, Inc., 672 F.3d 1335, 1349 (Fed. Cir. 2012) (claim language including the phrase “adapted to” is to be construed consistent with “configured to” language and requires that the structure must be “designed or configured to accomplish the specified objective, not simply that [it] can be made to serve that purpose.”); see also In re Giannelli, 739 F.3d 1375, 1379 (Fed. Cir. 2014). The plain language of Limitations 8B and 12B is clearly directed to the configuration of the bowl fill valve outlet port, in that these limitations recite “a bowl fill valve outlet port configured to.”8 The recited function is “attach directly to a tube that provides water from the bowl fill valve outlet port to an overflow tube.” The overflow tube is recited as part of the function in a clause identifying the tube to which the bowl fill valve outlet port is configured to attached — “that provides water from the bowl fill valve outlet port to an overflow tube.” The overflow tube, thus, is recited as part of the function defining the required structure of the bowl fill outlet port and is not separately claimed.” slip op. at 16

  • Obviousness (§103) › Graham factors (scope of art, differences, level of skill)UnpatentableUnpatentable

    “1. Petitioner’s Contentions Petitioner contends that the combination of Guoxin, Ho, and the Quick Connection Art teaches all of the limitations of claims 1–14 and provides a mapping showing where each claim limitation is found in the prior art. Pet. 21–59. We have reviewed the Petition’s mapping and determine that the Petition sufficiently shows that each limitation of claims 1–14 is disclosed by the combination of Guoxin, Ho, and the Quick Connection Art. Further, we have reviewed Petitioner’s rationale for combining the prior art and determine that the Petition sufficiently shows that it would have been obvious to a POSITA to combine Guoxin, Ho, and the Quick Connection Art.” slip op. at 23

  Patent outcomesUS 10,934,698 unpatentable
  Claim construction§ 103 obviousnesscites Phillips · KSR · Graham
  Patents in suitUS 10,934,698
• Penumbra, Inc. v. Rapidpulse, Inc.No claims unpatentable
  PTAB · Feb 17, 2026 · IPR2024-01261 · APJ Jamie T Wisz · IPR · Final written decision

  Claims 1–20 were not shown unpatentable because the asserted combinations did not teach the claimed predetermined cycle for controlling distal fluid flow.

  RulingsFinal written decision

  • Skill levelSkill level petitioner adoptedDecided for petitioner

    “(1) a person with a B.S. in engineering or an equivalent field, with two-four years of academic or industry experience in aspiration embolectomy and thrombectomy or comparable industry experience who would, where appropriate, work or consult with others, including a physician, to develop embolectomy or thrombectomy devices; or (2) an interventional neurosurgeon with at least three years of experience developing and/or using medical devices in embolectomy or thrombectomy procedures, and who would, where appropriate, work or consult with others, including an engineer, to develop such a medical device. Pet. 11 (citing Ex. 1005 ¶ 48). Petitioner also contends that, “[a] person with less education but more relevant practical experience, or more relevant education but less practical experience, may also meet this standard.” Id. Patent Owner states that for purposes of its PO Response, it “accepts ¶ 44). We adopt Petitioner’s characterization because it is consistent with the level of skill in the art at the time of the invention as reflected by the ’402 patent and the cited prior art. See Okajima v. Bourdeau, 261 F.3d 1350, 1355 (Fed. Cir. 2001) (explaining that specific findings regarding ordinary skill level are not required “where the prior art itself reflects an appropriate level and a need for testimony is not shown” (quoting Litton Indus. Prods., Inc. v. Solid State Sys. Corp., 755 F.2d 158, 163 (Fed. Cir. 1985))).” slip op. at 8

  • Claim Construction › Intrinsic evidence (Phillips canons) › Plain and ordinary meaning to a POSITATerm construed patent owner constructionDecided for patent owner

    “specification explicitly includes sensors similar to those in the prior art in support of their argument that the claimed “predetermined cycle” must not exclude the use of such sensors. Pet. Reply 15 (citing Ex. 1001, 32:55–33:7, 40:66–41:5, 44:9–29). We reviewed the portions of the specification cited by Petitioner. We agree with Patent Owner that one excerpt discussing sensor use appears to be directed to triggering the predetermined cycle rather than causing timing changes during the cycle itself (Ex. 1001, 32:55–66) (describing use of a pressure sensor to “determine when the vacuum channel 3 is clogged by a thrombus and automatically perform the unclogging procedures described herein”), while another excerpt discusses a sensor that Petitioner that the ’402 patent discusses the use of sensors to “tune” the system and that such “tuning” can be done statically (setting the cycle timing in advance) or dynamically (adjusting the timing during the cycle itself). See Ex. 1001, 48:19–49:50. Overall, we find that these disclosures involving sensors demonstrate that sensors may be used in various ways in different embodiments. However, none of these disclosures explicitly discuss the use of sensors in conjunction with a “pre-determined cycle.” Therefore, we find that the ’402 patent specification’s discussion of “sensors” are not particularly informative as to the appropriate construction of a “predetermined cycle” and do not outweigh the other explicit disclosures of “predetermined cycle” in the patent. We next turn to the other intrinsic evidence discussed by the parties — the prosecution history. As discussed by Patent Owner, in the Notice of Allowance, the Examiner found that Garrison did not teach or suggest a “predetermined cycle” because Garrison’s controller “changed the cycle of opening and closing the valves based on feedback from sensors.” Ex. 1004, 86. We acknowledge that the patent applicant filed subsequent comments during prosecution in which they stated that they “do[] not concede that the Examiner’s characterizations of the terms of the claims and the prior art are correct.” Id. at 29. However, we agree with Patent Owner that the importance of the Examiner’s statement in the Notice of Allowance does not rely on it being an express disclaimer (a standard which it does not meet). PO Sur-reply 8. We also considered Petitioner’s contention that the Examiner’s interpretation of Garrison may have been in error (PO Resp. 16); however, even if this were true, the Examiner’s statement still provides helpful insight into how the Examiner was interpreting the term sensors to change the opening and closing of valves during a cycle was not a “predetermined cycle.” Id. at 86. In sum, we find that Patent Owner’s proposed construction is consistent with the usage of the term “predetermined cycle” in the ’402 patent specification and prosecution history. Thus, after considering all of the cited evidence, we construe “predetermined cycle” to mean that “the timing of the sequence of valve operations in the cycle is determined beforehand, i.e., fixed, rather than varying based on feedback after operation begins.”” slip op. at 14

  • Claim Construction › Threshold & procedure › Whether a term needs construction (O2 Micro)No construction neededNot reached

    “2. Other Terms The parties also provided proposed constructions for the limitations of “[limited/limiting] to a positive amount of exit flow” and “control[ling] fluid flow in and out from the distal end of the catheter.” See Pet. 15–16; Pet. Reply 1–8; PO Resp. 22–24; PO Sur-Reply 2–6. However, having evaluated the arguments and evidence before us, we determine that construction of these terms is not necessary for purposes of this Decision. See Nidec Motor Corp. v. Zhongshan Broad Ocean Motor Co., 868 F.3d 1013, 1017 (Fed. Cir. 2017) (citing Vivid Techs., Inc. v. Am. Sci. & Eng’g, Inc., 200 F.3d 795, 803 (Fed. Cir. 1999) (“[O]nly those terms need be construed that are in controversy, and only to the extent necessary to resolve the controversy.”)).” slip op. at 16

  • Obviousness (§103) › Motivation to combine / reasonable expectation of successNot shown unpatentableNot shown unpatentable

    “We agree with Patent Owner that neither Petitioner nor Mr. Brown propose any combination of Yang and Mullins that does not include Mullins’s pressure sensor in order “to control fluid flow in and out from the distal end of the catheter.” Indeed, in addressing the “predetermined cycle” limitation, Mr. Brown contends that Mullins discloses a “cycling controller that ‘varies aspiration pressure according to sensed pressure within the catheter lumen.’” Ex.1005 ¶¶ 131–32 (citing, e.g., Ex.1008, 27:40–28:20 (“[a] novel aspect of this pump system is the incorporation of feedback into the pump algorithm in order to produce more effective pressure cycling”)). This use of a sensor to change pressure during a cycle, is not a “predetermined cycle” under our construction. combinations is its discussion of distal end flow control, not for its sensors.” Pet. Reply 17 (citing Ex. 1035 ¶ 83). However, Petitioner’s obviousness grounds rely on the combination of Yang and Mullins, especially with regard to Mullins’s disclosure of “a controller” in order “to control fluid flow in and out.” As discussed above, Mullins relies on the sensor-feedback approach in order to control flow and we find that Petitioner has not presented persuasive evidence of how the combined disclosures of Yang and Mullins would control flow without using Mullins’s sensor feedback approach. See W.L. Gore & Assocs., Inc. v. Garlock, Inc., 721 F.2d 1540, 1550 (Fed. Cir. 1983) (error to “consider[] … references in less than their entireties, i.e., in disregarding disclosures in [them] … that diverge from and teach away from the invention”). Therefore, we determine that Petitioner has not sufficiently shown that the combination of Yang and Mullins discloses or renders obvious “a controller configured to open and close the vacuum valve and the vent valve in a predetermined cycle to change a level of vacuum at the distal end of the catheter and to control fluid flow in and out from the distal end of the catheter.” Accordingly, having considered the parties’ respective evidence and arguments, we find that Petitioner has not shown by a preponderance of the evidence that claim 1 of the ’402 patent would have been unpatentable as obvious over the combination of Yang and Mullins.” slip op. at 27

  Patent outcomesUS 11,406,402 not shown unpatentable
  Claim construction§ 103 obviousnesscites Phillips · KSR · Graham
  Patents in suitUS 11,406,402
• Tommy John, Inc. v. Pakage Apparel, Inc.All claims unpatentable
  PTAB · Feb 12, 2026 · IPR2024-01163 · APJ Robert J Silverman · IPR · Final written decision

  The Board held claims 1–13, 15, and 16 unpatentable as obvious under § 103 over the identified combinations of Kitsch, Brocks, and Carrillo.

  RulingsFinal written decision

  • Skill levelSkill level petitioner adoptedDecided for petitioner

    “Accordingly, for purposes of this Decision, we adopt Petitioner’s” slip op. at 12

  • Obviousness (§103) › Motivation to combine / reasonable expectation of successMotivation foundReasonable expectation foundUnpatentable

    “21; 4:1:13–22. Accordingly, Kitsch and Brocks have similar goals, with respect to formation of a secure pouch for containing the genitals, for which each reference discloses a distinct technical solution. Thus, a POSITA would have regarded the application of Brocks’ familiar and effective gathering technique to Kitsch’s side panels as a viable approach for improving a supportive pouch, and would have expected such combination of teachings to achieve the structural benefit used in Brocks. See Pet. 25–27 (citing, inter alia, Ex. 1005 ¶¶ 68–72). In other words, a POSITA would have had a reasonable expectation that the combination of Kitsch and Brocks, as discussed above, would result in what is recited in limitation 1[g].” slip op. at 44

  Patent outcomesUS 10,834,974 unpatentable
  § 103 obviousnesscites Phillips · KSR · Graham
  Patents in suitUS 10,834,974
• Pacificorp / Interstate Power & Light Company et al. v. Birchtech Corp.Other
  PTAB · Feb 10, 2026 · IPR2025-00687 · APJ Kristina M Kalan · IPR · Remand

  On remand, the Board instituted IPR on claims 1–8 and 10–18 over all asserted grounds, finding a reasonable likelihood that at least one challenged claim is unpatentable.

  RulingsRemand decision

  • RemandInstituted

    “Paper 34, 1 (requesting “Director Review of the Director’s August 22, 2025 Decision Referring the Petition to the Board (‘Referral Decision’)”). Patent Owner argued that institution of IPR2025-00687 and IPR2025-00688 “should be discretionarily denied.” Id. at 5. Petitioner opposed. Paper 37. The Director granted review and found that “granting institution of two petitions that each challenge the same claims of the ’370 patent and ’218 patent 2” was an “abuse[] of discretion.” Paper 40, 1. The Director remanded the cases “to the Board panel to determine which of the two petitions challenging each of the ’370 and ’218 patents to institute.” Id. at 3. Pursuant to the Director’s instruction that we choose only one of the two petitions challenging the ’370 patent to institute, and for the reasons set forth below, we choose to institute review of the ’370 patent in this Petition, and not in IPR2025-00688.” slip op. at 3

  • PTAB / AIA Trials › §315(b) time barNot time barredDecided for petitioner

    “the proceeding is filed more than 1 year after the date on which the petitioner, real party in interest, or privy of the petitioner is served with a complaint alleging infringement of the patent.” 35 U.S.C. § 315(b). Petitioner bears the burden of demonstrating compliance with 35 U.S.C. § 312(a)(2) and § 315(b). See, e.g., Ventex Co., Ltd. v. Columbia Sportswear N. Am., Inc., IPR2017-00651, Paper 152 (PTAB Jan. 24, 2019)” slip op. at 9

  • Skill levelSkill level petitioner adoptedDecided for petitioner

    “may be considered, including the “type of problems encountered in the art; prior art solutions to those problems; rapidity with which innovations are made; sophistication of the technology; and educational level of active workers in the field.” In re GPAC, Inc., 57 F.3d 1573, 1579 (Fed. Cir. 1995). Furthermore, the prior art itself can reflect the appropriate level of ordinary skill in the art. Okajima v. Bourdeau, 261 F.3d 1350, 1355 (Fed. Cir. 2001).” slip op. at 13

  • Claim Construction › Threshold & procedure › Whether a term needs construction (O2 Micro)No construction neededOther

    “Petitioner “[does] not, at this time, contend that any term requires construction,” and instead, states that “[a]ll terms have been accorded their plain and ordinary meaning.” Pet. 11 (citing Ex. 1002 ¶¶ 212–215). Patent Owner asserts that it “does not presently propose any constructions,” but discusses the Board’s claim construction in IPR2020- 00834, Paper 18, 7–8. Prelim. Resp. 7. Claim terms need only be construed to the extent necessary to resolve the controversy. Wellman, Inc. v. Eastman Chem. Co., 642 F.3d 1355, 1361 (Fed. Cir. 2011). On this record and for purposes of this Decision, we see no need to construe any claim term expressly.” slip op. at 14

  Claim construction§ 102 anticipation§ 103 obviousnesscites Phillips · KSR
  Patents in suitUS 10,933,370
• Pacificorp / Interstate Power & Light Company et al. v. Birchtech Corp.Other
  PTAB · Feb 10, 2026 · IPR2025-00717 · APJ Zhenyu Yang · IPR · Remand

  On remand, the Board instituted IPR of claims 1–4 and 6–26 on all six asserted obviousness grounds, finding a reasonable likelihood of prevailing.

  RulingsRemand decision

  • Director reviewDirector review, grantedOther

    “The Director granted Director Review, finding that the panel “abused its discretion in granting institution of two petitions that each challenge the same claims” of the ’218 patent. Paper 39, 2. The Director vacated the DI and remanded the case “to the Board panel to determine which of the two petitions” to institute. Id. at 4.” slip op. at 4

  • Parallel petitionsDecided for petitioner

    “On November 4, 2025, we instituted inter partes review of all challenged claims based on all the grounds raised in the Petition. Paper 35 (“DI”). In the DI, we noted that “Petitioner filed an explanation regarding the necessity of multiple petitions,” and “Patent Owner d[id] not challenge that multiple petitions are necessary” in the Preliminary Response. Paper 23, 3 n.3.” slip op. at 3

  • PTAB / AIA Trials › Institution threshold (reasonable likelihood / more likely than not)InstitutedInstituted

    “inter partes review may not be instituted “unless . . . there is a reasonable likelihood that the petitioner would prevail with respect to at least 1 of the claims challenged in the petition.” 35 U.S.C. § 314(a). For the reasons provided below, we determine Petitioner has satisfied the threshold requirement set forth in 35 U.S.C. § 314(a). Therefore, we institute inter partes review of all challenged claims based on all the grounds raised in this Petition.3” slip op. at 4

  • Skill levelSkill level petitioner adoptedDecided for petitioner

    “Petitioner asserts that “[a] person of ordinary skill in the art [“POSITA”] would have at least a bachelor’s degree in chemical engineering, mechanical engineering, or a related field of study with at least two years of experience implementing pollution control in power generation plants for natural gas, coal, and/or industrial waste incineration.” Pet. 11 (citing Ex. 1002 ¶¶ 48–51). Patent Owner does not dispute the level of ordinary skill in the art. See generally Prelim Resp. For purposes of this Decision, we adopt Petitioner’s proposed definition of a POSITA because it is consistent with the skill level reflected in the disclosures of the ’218 patent and prior art. See Okajima, 261 F.3d at 1355 (the prior art may reflect an appropriate level of skill in the art).” slip op. at 10

  Claim construction§ 103 obviousnessDiscretionary denialcites Phillips · KSR
  Patents in suitUS 10,926,218
• Geneoscopy, Inc. v. Exact Sciences CorporationAll claims unpatentable
  PTAB · Feb 5, 2026 · IPR2024-01330 · APJ Ryan H Flax · IPR · Final written decision

  Claims 3, 4, and 12–19 are unpatentable as obvious under each asserted ground.

  RulingsFinal written decision

  • Skill levelOther
  • Expert testimonyOther
  • Obviousness (§103) › Objective indicia / secondary considerations › NexusObjective indicia no nexusDecided for petitioner

    “embody claims of the ’746 patent, the product has features not covered by the ’746 patent’s claims, some of which are critical unclaimed elements according to Patent Owner. Accordingly, Cologuard is not coextensive with the challenged claims, and no nexus between the product and the challenged claims is shown on this record.” slip op. at 35

  • Obviousness (§103) › Motivation to combine / reasonable expectation of successUnpatentableMotivation foundUnpatentable

    “developed where the patient need not manipulate their fecal sample to portion it, but the law of obviousness does not require an option to be the best option to be obvious. For these reasons, bearing in mind that the ultimate burden here is always on Petitioner, we are not persuaded by Patent Owner’s argument. We also reject Patent Owner’s argument that only impermissible” slip op. at 60

  Patent outcomesUS 11,970,746 unpatentable
  § 103 obviousnesscites Phillips · Graham
  Patents in suitUS 11,970,746
• Axion Biosystems, Inc. v. Agilent Technologies, Inc.No claims unpatentable
  PTAB · Feb 2, 2026 · IPR2024-01467 · APJ David Cotta · IPR · Final written decision

  Claims 1–8 and 11–15 were not shown unpatentable over Xu-752 and Jones because the proposed combination did not establish obvious millisecond time resolution.

  RulingsFinal written decision

  • Skill levelSkill level petitioner adoptedDecided for petitioner

    “B. Level of Ordinary Skill in the Art Petitioner contends a person of ordinary skill in the art (“POSA”) as of May 2009 “would have had a B.S. in electrical/mechanical/biomedical engineering or biological science, or a related field, and approximately 2 years of relevant experience or equivalent study in systems and methods for bioanalysis of cells.” Pet. 14 (citing Ex. 1003 ¶¶ 23–25). Patent Owner adopts this definition for purposes of this proceeding. PO Resp. 9 (citing Ex. 2009 ¶ 19). We find Petitioner’s description of the level of ordinary skill in the art to be consistent with the level of skill reflected in the ’508 patent and in the prior art of record. Accordingly, we apply Petitioner’s definition in this decision.” slip op. at 7

  • Claim Construction › Intrinsic evidence (Phillips canons) › Lexicography (patentee as own lexicographer)Term construed petitioner constructionDecided for petitioner

    “As used herein, “impedance measurement at millisecond time resolution” refers to the ability to perform a series of at least two consecutive impedance measurements within milliseconds of one another for each and every well of the system where each well is associated with an electrode array for impedance measurement. In each instance the time between two consecutive impedance measurements are less than 300 milliseconds from one another. Id. at 10:8–15. There does not appear to be any dispute as to the definitional nature of the first sentence in the passage above. That is, the parties agree that millisecond time resolution should be construed to mean: “the time between two consecutive impedance measurements for each and every well being evaluated in the claimed apparatus or system.” PO Resp. 15 (proposing construction); Pet. Reply. 23 (“Axion also agrees that the term ‘millisecond time resolution’ is ‘the time between two consecutive impedance measurements for each and every well being evaluated in the claimed apparatus or system.’”). The parties also agree that we do not need to determine whether the time interval between two consecutive impedance measurements is less than 300 milliseconds, as set forth in the definition portion of the specification, or whether it can be met by some other time interval, as suggested by other portions of the specification. See e.g., Ex. 1001, 23:49–55 (explaining that “[i]n some embodiments 500 millisecond time resolution is sufficient”), 24:37–39 (similar); PO Resp. 15 (arguing that “the distinction between 300 milliseconds and 500 milliseconds is immaterial to the dispute in this IPR because Jones teaches a 1.5 second update period, thus at least three times longer than the 500 milliseconds formulation”); Pet. Reply 23–24 (section headed “[Petitioner] Agrees That, In This IPR, The 300 Versus 500 Milliseconds Distinction is Immaterial To Addressing the Unpatentability of the Challenged Claims”), see also, Pet. Reply 24–26 (asserting that the claims are indefinite because it is not clear whether they require a 300 or a 500 millisecond time interval, but arguing that “the claims’ unpatentability can be determined without resolving the 300 versus 500 milliseconds indefiniteness issue”). We agree with the parties that “millisecond time resolution” should be construed to mean: “the time between two consecutive impedance measurements for each and every well being evaluated in the claimed apparatus or system.” PO Resp. 15; Pet. Reply. 23. We further agree that resolution of this case does not require that we determine whether the period between two consecutive impedance measurements is less than 300 or less than 500 milliseconds because Petitioner has not carried its burden under either time interval.” slip op. at 7

  • Expert testimonyPetitioner expert discountedDecided for patent owner

    “Ex. 1003 ¶ 179. But Dr. Kim does not cite to any additional supporting evidence or provide any technical reasoning to support his statements. The notion that one can reduce the time between measurements by, e.g., reducing the number of frequencies measured, has intuitive appeal and appears mathematically correct. However, the absence of technical reasoning and supporting evidence diminishes the persuasiveness of Dr. Kim’s testimony that the POSA would made such modifications to reduce the time between measurements. Dr. Kim does provide some technical reasoning in connection with his discussion of eliminating all reference channels as a way to get the time resolution down to the levels required by, e.g., claim 14, which recites a millisecond time resolution of “less than 5 milliseconds.” See e.g., Ex. 1003 ¶ 172 (“A POSA seeking to study biological cell phenomena occurring on the order of a few milliseconds would have recognized that after measuring the reference network channels at the start, the reference network channels would not need measured again for some time, e.g., because temperature and other drift factors do not change appreciably on a millisecond time scale.”). However, even if we were to credit this testimony, Dr. Kim still lacks support and reasoning for the selection of the other parameters in his noreference-channel calculations. See, e.g., id. ¶ 173 (positing, but not providing technical reasoning for using, a no-reference-channel impedance system with 16 wells, a single 10kHz measurement frequency, and 16 daughter boards that measure simultaneously rather than sequentially).” slip op. at 29

  • Obviousness (§103) › Motivation to combine / reasonable expectation of success › HindsightMotivation not foundNot shown unpatentableNot shown unpatentable

    “Given that Jones’s only exemplified embodiment targets a 1.5 second update period, that Jones does not suggest reducing the update period, and that much of Jones’s focus is on benefits other than speed of measurement, Jones’s impedance analyzer seems an unlikely choice for a POSA seeking to take measurements having millisecond time resolution. Put another way, we find no persuasive non-hindsight reason that supports Petitioner’s assertion that the POSA would have sought to apply Jones’s impedance analyzer to Xu-752’s system in order to take measurements in millisecond time resolution.” slip op. at 22

  Patent outcomesUS 11,906,508 not shown unpatentable
  Claim construction§ 103 obviousnesscites KSR · Graham
  Patents in suitUS 11,906,508
• Mobileye Global, Inc. / ZF Active Safety And Electronics US LLC v. Facet Technology Corp.Some claims unpatentable
  PTAB · Jan 23, 2026 · IPR2025-00749 · APJ Sean P O’Hanlon · IPR · Final written decision

  Claims 1–4 and 8–13 are unpatentable as obvious over Gallagher and Schofield; claims 5–7 and 14–16 were not shown unpatentable on the asserted combinations.

  RulingsFinal written decision

  • Skill levelSkill level petitioner adoptedDecided for petitioner

    “skilled artisan would have, with Petitioner contending four years and Patent Owner contending two years. Patent Owner’s witness, Dr. Papanikolopoulos, does not provide an explanation for his opinion or support his definition of the level of ordinary skill with citations to evidence. See Ex. 2023 ¶ 57 (“In my opinion, [Petitioner’s definition] is an excessive level of ordinary skill in the art, and I believe instead [an ordinarily skilled artisan] would more likely have two years of experience rather than four years.”). On the other hand, Petitioner’s witness, Dr. Thorpe, does provide an explanation for his opinion, explaining that his assertion that four years of experience is required is based on the state of the art, typical undergraduate curricula, and his supervision of doctoral students. Ex. 1030 ¶ 21. Based on the arguments presented and the cited references, we find Petitioner’s definition of the level of ordinary skill reasonable and for purposes of this Decision, adopt it as our own. We note that we would reach the same conclusions under either proposed standard.” slip op. at 11

  • Claim Construction › Threshold & procedure › Whether a term needs construction (O2 Micro)No construction neededOther

    “As a general rule, unless the steps of a method claim actually recite an order, the steps are not ordinarily construed to require one.” Mformation Techs., Inc. v. Rsch. in Motion Ltd., 764 F.3d 1392, 1398 (Fed. Cir. 2014) (citation modified). “However, a claim requires an ordering of steps when the claim language, as a matter of logic or grammar, requires that the steps be performed in the order written, or the specification directly or implicitly requires an order of steps.” Id. (cleaned up). “[O]rdinarily in process claims steps taken concurrently are the equivalent of steps taken successively.” In re White, 39 F.2d 974, 975 (CCPA 1930); see also Cybersettle, 243 F. App’x. at 609 (finding “the step of calculating the differences between demands and offers can occur concurrently with the [next enumerated step of] receipt of multiple demands and offers” and “the testing step of ‘determining whether any of the differences fall within the predetermined settlement range’ may occur concurrently with the receipt and comparison of the bids” (citation modified)). This is especially true here, given that the recitations at issue are functional language in an apparatus (system) claim. We further agree with Petitioner that the ’328 patent discloses such concurrent performance of these steps: Either concurrent with or subsequent to the identification of road signs 30 and generation of asset management database 24, the computer processor 22 evaluates that portion 32 of each video frame or image that depicts a road sign 30 to determine a set of color values 40, 42 for each of a plurality of colors on the road sign 32. A retroreflectivity value is generated for each color portion 34, 36 on each frame of the tagged videostream 20 containing the road sign 30 that represents a different color value 40, 42. slip op. at 13

  • Obviousness (§103) › Motivation to combine / reasonable expectation of successMotivation foundReasonable expectation foundUnpatentable

    “Petitioner is correct to the extent that it need not show that “the features of [Schofield] may be bodily incorporated into the structure of [Gallagher],” but Petitioner must prove that “a skilled artisan would have been motivated to combine the teachings of the prior art references to achieve the claimed invention.” Allied Erecting, 825 F.3d at 1381. For claim 9, Petitioner proposes to modify Gallagher’s system to use “Schofield’s determination of a light source’s location within a field of view” in Gallagher’s system. Pet. 23. Thus, Petitioner’s combination does not require the combination of Gallagher’s and Schofield’s sensors into a single system, and Patent Owner’s “sensor fusion” argument is inapposite. See Tr. 48:8–49:6 (Patent Owner’s counsel confirming that the problem of “sensor fusion” stems from combining disparate sensors in a single system). As noted above, Schofield teaches considering the relative location of the light source in determining whether the light source is from headlights or taillights (that is, an object of interest). See Ex. 1006, 9:26–35. We are persuaded that an ordinarily skilled artisan would be motivated to use this teaching in Gallagher’s device to help distinguish between road markers that are arranged side-by-side and have a reasonable expectation of success in doing so. See Ex. 1005 ¶ 40; Ex. 1003 ¶¶ 77 (“[An ordinarily skilled artisan] would have seen Schofield’s determination of a light source’s location within the field of view as advantageous because it would have allowed Gallagher’s computer to associate the measured reflectance level with the appropriate road marker.”), 79 (“[I]mplementing this determination would have required [an ordinarily skilled artisan] to implement only conventional techniques of image processing (identifying a location of a particular pixel within an array), which was well known by [an ordinarily skilled artisan], to predictably yield the result of the location within a field of view indicating an intensity value associated with a road marker. Given that Schofield and Gallagher disclose similar types of arrays, this combination would have merely required the use of Schofield’s known technique to improve Gallagher’s similar device in the same way.”).” slip op. at 30

  • Obviousness (§103) › Analogous artNon analogous artNot shown unpatentable

    “A reference qualifies as prior art for a determination under § 103 when it is analogous to the claimed invention. In re Clay, 966 F.2d 656, 658 (Fed. Cir. 1992). Two separate tests define the scope of analogous prior art: (1) whether the art is from the same field of endeavor, regardless of the problem addressed, and (2) if the reference is not within the field of the inventor’s endeavor, whether the reference still is reasonably pertinent to the particular problem with which the inventor is involved. In re Bigio, 381 F.3d 1320, 1325 (Fed. Cir. 2004) (citing In re Deminski, 796 F.2d 436, 442 (Fed. Cir. 1986)).” slip op. at 49

  Patent outcomesUS 9,671,328 mixed
  Claim construction§ 103 obviousnesscites KSR · Graham
  Patents in suitUS 9,671,328
• Mobileye Global, Inc. / ZF Active Safety And Electronics US LLC v. Facet Technology Corp.Some claims unpatentable
  PTAB · Jan 23, 2026 · IPR2024-01111 · APJ Sean P O’Hanlon · IPR · Final written decision

  Claims 1–4 and 8–13 are unpatentable as obvious over Gallagher and Schofield; claims 5–7 and 14–16 were not shown unpatentable on the asserted grounds.

  RulingsFinal written decision

  • Skill levelSkill level petitioner adoptedDecided for petitioner

    “The parties disagree only on the length of experience an ordinarily skilled artisan would have, with Petitioner contending four years and Patent Owner contending two years. Patent Owner’s witness, Dr. Papanikolopoulos, does not provide an explanation for his opinion or support his definition of the level of ordinary skill with citations to evidence. See Ex. 2023 ¶ 57 (“In my opinion, [Petitioner’s definition] is an excessive level of ordinary skill in the art, and I believe instead [an ordinarily skilled artisan] would more likely have two years of experience rather than four years.”). On the other hand, Petitioner’s witness, Dr. Thorpe, does provide an explanation for his opinion, explaining that his assertion that four years of experience is required is based on the state of the art, typical undergraduate curricula, and his supervision of doctoral students. Ex. 1030 ¶ 21. Based on the arguments presented and the cited references, we find Petitioner’s definition of the level of ordinary skill reasonable and for purposes of this Decision, adopt it as our own. We note that we would reach the same conclusions under either proposed standard.” slip op. at 11

  • Claim Construction › Intrinsic evidence (Phillips canons) › Plain and ordinary meaning to a POSITANo construction needed

    “As a general rule, unless the steps of a method claim actually recite an order, the steps are not ordinarily construed to require one.” Mformation Techs., Inc. v. Rsch. in Motion Ltd., 764 F.3d 1392, 1398 (Fed. Cir. 2014) (citation modified). “However, a claim requires an ordering of steps when the claim language, as a matter of logic or grammar, requires that the steps be performed in the order written, or the specification directly or implicitly requires an order of steps.” Id. (cleaned up). “[O]rdinarily in process claims steps taken concurrently are the equivalent of steps taken successively.” In re White, 39 F.2d 974, 975 (CCPA 1930); see also Cybersettle, 243 F. App’x. at 609 (finding “the step of calculating the differences between demands and offers can occur concurrently with the [next enumerated step of] receipt of multiple demands and offers” and “the testing step of ‘determining whether any of the differences fall within the predetermined settlement range’ may occur concurrently with the receipt and comparison of the bids” (citation modified)). This is especially true here, given that the recitations at issue are functional language in an apparatus (system) claim. We further agree with Petitioner that the ’328 patent discloses such concurrent performance of these steps: Either concurrent with or subsequent to the identification of road signs 30 and generation of asset management database 24, the computer processor 22 evaluates that portion 32 of each video frame or image that depicts a road sign 30 to determine a set of color values 40, 42 for each of a plurality of colors on the road sign 32. A retroreflectivity value is generated for each color portion 34, 36 on each frame of the tagged videostream 20 containing the road sign 30 that represents a different color value 40, 42. Ex. 1001, 5:52–60. Thus, the ’328 patent discloses concurrently detecting objects of interest (road signs) and determining whether the object of interest has a particular color value. slip op. at 13

  • Obviousness (§103) › Motivation to combine / reasonable expectation of successMotivation foundReasonable expectation foundDecided for petitioner

    “Petitioner is correct to the extent that it need not show that “the features of [Schofield] may be bodily incorporated into the structure of [Gallagher],” but Petitioner must prove that “a skilled artisan would have been motivated to combine the teachings of the prior art references to achieve the claimed invention.” Allied Erecting, 825 F.3d at 1381. For claim 9, Petitioner proposes to modify Gallagher’s system to use “Schofield’s determination of a light source’s location within a field of view” in Gallagher’s system. Pet. 23. Thus, Petitioner’s combination does not require the combination of Gallagher’s and Schofield’s sensors into a single system, and Patent Owner’s “sensor fusion” argument is inapposite. See Tr. 48:8–49:6 (Patent Owner’s counsel confirming that the problem of “sensor fusion” stems from combining disparate sensors in a single system). As noted above, Schofield teaches considering the relative location of the light source in determining whether the light source is from headlights or taillights (that is, an object of interest). See Ex. 1006, 9:26–35. We are persuaded that an ordinarily skilled artisan would be motivated to use this teaching in Gallagher’s device to help distinguish between road markers that are arranged side-by-side and have a reasonable expectation of success in doing so. See Ex. 1005 ¶ 40; Ex. 1003 ¶¶ 77 (“[An ordinarily skilled artisan] would have seen Schofield’s determination of a light source’s location within the field of view as advantageous because it would have allowed Gallagher’s computer to associate the measured reflectance level with the appropriate road marker.”), 79 (“[I]mplementing this determination would have required [an ordinarily skilled artisan] to implement only conventional techniques of image processing (identifying a location of a particular pixel within an array), which was well known by [an ordinarily skilled artisan], to predictably yield the result of the location within a field of view indicating an intensity value associated with a road marker. Given that Schofield and Gallagher disclose similar types of arrays, this combination would have merely required the use of Schofield’s known technique to improve Gallagher’s similar device in the same way.”).” slip op. at 30

  • Expert testimonyPatent owner expert discountedOther

    “The parties disagree only on the length of experience an ordinarily skilled artisan would have, with Petitioner contending four years and Patent Owner contending two years. Patent Owner’s witness, Dr. Papanikolopoulos, does not provide an explanation for his opinion or support his definition of the level of ordinary skill with citations to evidence. See Ex. 2023 ¶ 57 (“In my opinion, [Petitioner’s definition] is an excessive level of ordinary skill in the art, and I believe instead [an ordinarily skilled artisan] would more likely have two years of experience rather than four years.”). On the other hand, Petitioner’s witness, Dr. Thorpe, does provide an explanation for his opinion, explaining that his assertion that four years of experience is required is based on the state of the art, typical undergraduate curricula, and his supervision of doctoral students. Ex. 1030 ¶ 21. Based on the arguments presented and the cited references, we find Petitioner’s definition of the level of ordinary skill reasonable and for purposes of this Decision, adopt it as our own. We note that we would reach the same conclusions under either proposed standard.” slip op. at 11

  Patent outcomesUS 9,671,328 mixed
  Claim construction§ 103 obviousnesscites KSR · Graham
  Patents in suitUS 9,671,328

Holdings, summaries, rulings, issues, outcomes, winners and claim constructions shown for a decision were generated by a large language model reading the opinion. They are a guide to the decision, not the decision. Confirm every one against the court's own text before relying on it. Outcomes read from the patent owner’s side. Party names are extracted from the decision and are missing on about 900 short Director denials and scans, which carry the trial number instead.