• Reolink Innovation Inc. / Shenzhen Reolink Technology Co., Ltd. v. Throughtek Co. Ltd.Adverse judgment
  PTAB · May 19, 2026 · IPR2025-01327 · APJ Sheila F Mcshane · IPR · Adverse judgment

  The Board entered adverse judgment against Throughtek on claims 1–19 after finding it abandoned the contest by failing to file mandatory notices or respond to the show-cause order.

  RulingsAdverse judgment

  • Adverse judgmentAdverse judgmentGranted

    “The Order to Show Cause explained that under 37 C.F.R. § 42.73(b), “[a]ctions construed to be a request for adverse judgment include . . . [a]bandonment of the contest.” Paper 8, 3. The Order to Show Cause also explained that failure to participate in a proceeding, such as failure to file mandatory notices as required under 37 C.F.R. § 42.8, may be considered abandonment of the contest and result in adverse judgment against Patent Owner under 37 C.F.R. § 42.73(b). Id. (citing Cellpak, Inc. v. Mambate USA Inc., IPR2021-00007, Paper 4 at 2 (PTAB Mar. 23, 2021)). The Order to Show Cause gave Patent Owner ten calendar days to show cause why adverse judgment should not be entered against it. Id. Patent Owner did not respond to the Order to Show Cause. More than ten calendar days have elapsed since the date the Order to Show Cause was entered, and Patent Owner has not filed mandatory notices. In view of Patent Owner’s failure to file mandatory notices within the specified time period, we determine that Patent Owner has abandoned the contest. Pursuant to 37 C.F.R. § 42.73(b)(4), we construe Patent Owner’s abandonment of the contest as a request for adverse judgment. Under these circumstances, we determine that entry of judgment against Patent Owner is appropriate.” slip op. at 3

  None
  Patents in suitUS 9,727,655
• Cisco Systems, Inc. v. Portsmouth Network Corp.No claims unpatentable
  PTAB · Mar 31, 2026 · IPR2024-01450 · APJ Peter D Shapiro · IPR · Final written decision

  Claims 1–4, 6–11, and 13–20 were not shown unpatentable because Dziong and Sathyanath do not teach the claimed sharing definition for existing connections with allocated bandwidth.

  RulingsFinal written decision

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

    “First, the claims use present-tense language, “one or more other connections, which have respective bandwidths and which are permitted to share a bandwidth allocation with the new connection.”3 Ex. 1001, claim 1 (emphasis added). The exclusive use of the present tense have indicates “other connections” must have current possession of the bandwidth. For these other connections to share bandwidth with a newly established connection, they must already exist and have bandwidth ready for immediate use, rather than merely holding a dormant “reservation” pending a network failure. See PO Supp. Br. 1. The Federal Circuit addressed a similar situation where the Court found the present-tense limitation “is connected to the computer network” means a device was required to be connected at the” slip op. at 15

  • Obviousness (§103) › Graham factors (scope of art, differences, level of skill)Not shown unpatentableNot shown unpatentable

    “combination, do not teach or suggest limitations 1.2 and 1.3 requiring: providing a sharing definition specifying one or more other connections, which have respective bandwidths and which are permitted to share a bandwidth allocation with the new connection, such that a total bandwidth allocated jointly to the new connection and to the other connections in any given segment is equal to a maximum of the requested bandwidth and of the bandwidths of the other connections in the given segment Ex. 1001, limitations 1.2, 1.3 (emphasis added); see PO Resp. 17–22; Sur-reply 4–5, 12–14. As discussed above in Section II.C.2, we interpret “other connections” to mean “existing connections in the network that already have bandwidth allocated to them.” Because the information shared in Dziong and Sathyanath, described below, relates to reserved protection paths, rather than existing connections that have bandwidth that can currently transmit network traffic, the references do not teach or suggest the “other connections” part of the sharing definition in limitations 1.2 and 1.3. Dziong describes advertising, across the network, the amount of bandwidth reserved for recovery on each link that would be activated when a protected link fails. See, e.g., Ex. 1005 ¶ 60; Pet. 36. Once activated, network traffic from a “primary path” failure is rerouted to these recovery paths. See Ex. 1005 ¶¶ 7–9, 70, 83. Petitioner points to this advertising of the reserved bandwidth information as teaching the claimed “sharing definition.” Pet. 33–36 (arguing that the “protection paths [in Dziong] have bandwidth reservations” and “share an overall protection bandwidth reservation”); Reply 21–23. However, since the advertised information only contains information about the recovery paths “that would be activated” upon a primary path failure, such paths are not existing connections that already have bandwidth allocated to them, and therefore do not teach the claimed “other connections” that are part of the sharing definition. See, e.g., Ex. 1005 ¶ 60.” slip op. at 43

  Patent outcomesUS 7,596,088 not shown unpatentable
  Claim construction§ 103 obviousnesscites Phillips · KSR · Graham
  Patents in suitUS 7,596,088
• Google LLC v. Escapex IP LLCAll claims unpatentable
  PTAB · Mar 30, 2026 · IPR2025-00337 · APJ Justin T Arbes · IPR · Final written decision

  Claims 1–24 are unpatentable under § 103: claims 1–3, 5–6, 13–15, 17–18 over Fuloria and Andler; the remaining claims over combinations adding WO ’100, Bartholomew, Kirk, or Cheung.

  RulingsFinal written decision

  • Skill levelSkill level petitioner adoptedDecided for petitioner

    “a person of ordinary skill in the art would have had “a bachelor’s degree in computer science or a similar field and three years of professional computer programming experience, including experience with networked media and databases, where additional education can substitute for experience or vice versa.” Pet. 20 (citing Ex. 1002 ¶¶ 27–31). In the Decision on Institution, Inst. 7–8. Patent Owner adopts Petitioner’s proposed definition “because it comports with the technology and claims of the ’687 [p]atent as well as the asserted prior art.” PO Resp. 4; Tr. 36:4–18. Based on the full record developed during trial, including our review of the ’687 patent and the types of problems and solutions described in the ’687 patent and cited prior art, we maintain the previously adopted definition of the level of ordinary skill in the art and apply it for purposes of this Decision.” slip op. at 9

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

    “37 C.F.R. § 42.100(b). Petitioner argues that the term “engagement” in independent claims 1, 11–13, 23, and 24 is defined in the Specification of the ’687 patent and should be interpreted to mean “an indication that a user should be distinguished with respect to the content over another user.” Pet. 11 (citing Ex. 1001, col. 5, ll. 53–55; Ex. 1002 ¶ 41). Patent Owner agrees that the Specification “defines” the term in that manner. PO Resp. 13. The Board did not interpret any terms in the Decision on Institution. Dec. on Inst. 9. We agree with the parties’ proposed interpretation of “engagement” and apply it for purposes of this Decision, based on the Specification’s disclosure that “[a] user engagement with content refers to an indication that a user should be distinguished with” slip op. at 10

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

    “No other terms require express interpretation to determine whether Petitioner has met its burden to prove unpatentability of the challenged claims. See Nidec Motor Corp. v. Zhongshan Broad Ocean Motor Co., 868 F.3d 1013, 1017 (Fed. Cir. 2017) (“Because we need only construe terms ‘that are in controversy, and only to the extent necessary to resolve the controversy,’ we need not construe [a particular claim limitation] where the construction is not ‘material to the . . . dispute.’” (emphasis added) (citation omitted)).” slip op. at 11

  • Expert testimonyPetitioner expert creditedDecided for petitioner

  Patent outcomesUS 10,474,687 unpatentable
  Claim construction§ 103 obviousnesscites KSR · Graham
  Patents in suitUS 10,474,687
• Reolink Innovation Inc. / Shenzhen Reolink Technology Co., Ltd. v. Throughtek Co., Ltd.All claims unpatentable
  PTAB · Jan 23, 2026 · IPR2024-01192 · APJ Michael J Strauss · IPR · Final written decision

  Claims 1–10 and 16 are unpatentable as obvious over the asserted combinations of the Lorex Manual or Lorex Video with the identified references.

  RulingsFinal written decision

  • Novelty / Anticipation (§102) › Priority / effective filing date / continuation supportPriority date awardedDecided for petitioner

    “Patent Owner does not dispute any of Petitioner’s contentions as to the effective filing date, stating in agreement with Petitioner’s asserted Effective Filing Date of the Challenged Claims that “[t]he ’916 Patent claims a priority of a provisional application 61/924,240 filed on January 7, 2014.” PO Resp. 8. Given that the parties are in agreement on the January 7, 2014, effective filing date, we similarly use January 7, 2014, as the effective filing date of the challenged claims for purposes of this Decision.” slip op. at 4

  • Skill levelSkill level petitioner adoptedDecided for petitioner

    “II. ANALYSIS A. Level of Ordinary Skill in the Art Relying on the testimony of Vlad Kardashov, Petitioner proposes that a person of ordinary skill in the art at the time of the invention of the ’916 patent “would have had a bachelor’s degree in electrical engineering and two 7 US 2012/0198040 A1, published August 2, 2012 (Ex. 1011, “Kuo”). 8 The subject ’916 patent claims priority to Kuo as a continuation-in-part of that earlier filed application. Ex. 1001, code (63). 9 Lorex Technology Inc., “How to set up remote access for DVR using - Lorex Stratus Connectivity” (June 18, 2013), available at https://www. youtube.com/watch?v=fMPRi9WFuTM (Ex. 1012, the “Lorex Video”). 10 US 2012/0113265 A1, published May 10, 2012 (Ex. 1013, “Galvin”). years of work experience with network and communication technologies.” Pet. 8 (citing Ex. 1003 ¶¶ 12–14). Patent Owner does not contest Petitioner’s proposal or provide a proposal of its own. On the complete record, we adopt Petitioner’s description of the level of ordinary skill in the art, as it is consistent with the technology described in the ’916 patent and the asserted prior art. See Okajima v. Bourdeau, 261 F.3d 1350, 1355 (Fed. Cir. 2001).” slip op. at 8

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

    “Petitioner asserts that “no claim elements need a formal construction for purposes of resolving controversies in this proceeding.” Pet. 9 (citing Ex. 1003 ¶¶ 43–44; Wellman, Inc. v. Eastman Chem. Co., 642 F.3d 1355, 1361 (Fed. Cir. 2011), Google Inc. v. Intellectual Ventures II LLC, 701 Fed. Appx. 946, 956 (Fed. Cir. 2017)). Petitioner states “[a]ll claim terms should be construed according to the Phillips standard.” Id. (citing Phillips, 415 F.3d at 1303; 37 C.F.R. § 42.100). Patent Owner presents no proposed claim constructions. We determine that we need not expressly construe any claim terms to resolve the parties’ disputes on the current record. See Nidec Motor Corp. v. Zhongshan Broad Ocean Motor Co., 868 F.3d 1013, 1017 (Fed. Cir. 2017) (“[W]e need only construe terms ‘that are in controversy, and only to the extent necessary to resolve the controversy.’”) (quoting Vivid Techs., Inc. v. Am. Sci. & Eng’g, Inc., 200 F.3d 795, 803 (Fed. Cir. 1999)).” slip op. at 9

  • Novelty / Anticipation (§102) › Prior-art status of a reference › Printed publication / public accessibilityReference is prior artPriority date awardedDecided for petitioner

    “that Patent Owner fails to demonstrate that the Lorex Manual was based on a disclosure made by the inventor or joint inventor or by another who obtained the subject matter disclosed directly or indirectly from the inventor or a joint inventor. The Lorex Manual is relied on under Ground 1A, exclusively or in the alternative to or in combination with Kim, for all claim elements. Pet. 9– 31. Patent Owner fails to demonstrate that this subject matter was disclosed to Lorex by ThroughTek, much less by one of the inventors of the ’916 Patent.” slip op. at 22

  Patent outcomesUS 9,774,916 unpatentable
  Claim construction§ 102 anticipation§ 103 obviousnesscites Phillips · KSR · Graham
  Patents in suitUS 9,774,916
• Juniper Networks, Inc. v. Portsmouth Network Corp.Some claims unpatentable
  PTAB · Jan 13, 2026 · IPR2024-00913 · APJ Justin T Arbes · IPR · Final written decision

  Claims 1, 2, 4, 6, 7, 11, 12, 14, 16, and 17 are unpatentable over Blease, Weyman, and Hu, with some claims also over Deng; claims 8–10 and 18 were not shown unpatentable.

  RulingsFinal written decision

  • Expert testimonyPetitioner expert discountedOther

    “disclosure in Weyman (or Blease) for deactivating and activating ports, or performing certain actions in the time between such actions. Again, the only portion of Weyman cited pertains to a request to join the fabric from a processing unit having a “default” configuration, which does not relate to the timing or sequence of events in initialization. See Ex. 1006 ¶¶ 69, 156, 161–162; Ex. 1103 ¶¶ 93–94. Nor does Dr. Lavian point to any other evidence in the record supporting his conclusion that a person of ordinary skill in the art would have “ensure[d] that the processing unit is deactivated prior to being updated for use . . . and then activate[d] the processing unit after updating.” See Ex. 1103 ¶ 94. Accordingly, we give little weight to Dr. Lavian’s conclusory opinion” slip op. at 75

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

    “See Axonics, 73 F.4th at 957; Allied Erecting, 825 F.3d at 1381; Mouttet, 686 F.3d at 1332–33. Petitioner’s position is that, based on the teachings of Weyman, a person of ordinary skill in the art would have modified Blease’s system to distribute the functionality of control unit 44 (including its existing multicast forwarding information 48 used by OIF mapper 50). See Pet. 23–26, 38; Fleming v. Cirrus Design Corp., 28 F.4th 1214, 1222 (Fed. Cir. 2022) (“That the proposed combination of [two references]—rather than one of the individual references—discloses the disputed claim limitations does not defeat the Board’s conclusion of obviousness. In this case, it is sufficient that a person of ordinary skill in the art would have been motivated to combine the prior art in a way such that the combination discloses the claim limitations.”).” slip op. at 55

  • Obviousness (§103) › Graham factors (scope of art, differences, level of skill)Not shown unpatentableNot shown unpatentable

    “10 In the Cisco IPR, we determined that Cisco had proven claims 8 and 18 to be unpatentable based on a different combination of references (identified as Weyman, Jain, and LeMaire), finding that limitation 8[f.ii] was taught by Jain and LeMaire. IPR2024-00506, Paper 38 at 58–77. As explained herein, we are not persuaded by Petitioner’s arguments in this proceeding that limitation 8[f.ii] is taught or suggested by Weyman. Also, in the Decision on Institution in this proceeding, the Board found that there were questions as to Petitioner’s showing for limitation 8[f.ii] and declined to reach a conclusion on whether Petitioner had shown a reasonable likelihood of prevailing on its asserted ground based on Blease and Weyman. Dec. on Inst. 43.” slip op. at 71

  Patent outcomesUS 8,014,394 mixed
  § 103 obviousnesscites KSR · Graham
  Patents in suitUS 8,014,394
• Samsung Electronics Co., Ltd. v. CM HK LimitedInstituted
  PTAB · Dec 18, 2025 · IPR2025-01071 · APJ Benjamin D M Wood · IPR · Institution

  The Board instituted IPR of claims 1–7, 12, 14, and 25 because Petitioner showed a reasonable likelihood of prevailing on its § 103 obviousness challenge over Bassompiere.

  RulingsInstitution decision

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

    “We have authority under 35 U.S.C. § 314, which provides that an 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). On the preliminary record before us, we determine that Petitioner has satisfied this threshold requirement, and therefore we institute inter partes review of claims 1–7, 12, 14, and 25 of the ’687 patent.” slip op. at 2

  • Skill levelSkill level petitioner adoptedDecided for petitioner

    “Patent Owner does not offer any reason why we should deviate from the Board’s determinations in the prior IPRs that one of ordinary skill in the art would have had knowledge of Kalman filters and quaternion mathematics. Nor are we aware of any such reason. On the contrary, the Board’s prior determinations are consistent with the level of ordinary skill reflected by prior art of record. See Okajima v. Bourdeau, 261 F.3d 1350, 1355 (Fed. Cir. 2001); In re GPAC Inc., 57 F.3d 1573, 1579 (Fed. Cir. 1995); In re Oelrich, 579 F.2d 86, 91 (CCPA 1978). Bassompiere, for example, teaches using a data merging algorithm that is, “[a]dvantageously,” extended Kalman filtering. Ex. 1006, 4:17. Bassompiere also teaches using quaternions to determine a device’s pitch and roll about a horizontal reference frame. Id. at 6:3–8, 20:10–21:1. Patent Owner argues that Dr. Sarrafzadeh’s testimony regarding the level of skill in the art in this proceeding contradicts his testimony in the prior IPRs, which did not include knowledge of Kalman filters and quaternion mathematics in his definition of the level of ordinary skill in the art. Prelim. Resp. 24–26. Patent Owner asserts that this contradiction “undermin[es] his credibility.” Id. at 26. We disagree. The testimony Dr. Sarrafzadeh provided in the earlier IPRs obviously preceded the Board’s determinations in those proceedings that, on the whole record, including the testimony of then-Patent Owner’s declarant, the level of ordinary skill included knowledge of Kalman Filters and quaternions. Dr. Sarrafzadeh’s testimony in this proceeding reasonably aligns with those determinations. Accordingly, we adopt Petitioner’s definition of the level of ordinary skill in the art for purposes of this Decision.” slip op. at 12

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

    “The parties agree that the claimed “spatial reference frame” is associated with a device, has its origin at the same point in the device, and has axes that are always fixed with respect to the device. The only disagreement is whether that device is a “3D pointing device” or an “electronic device.” The Specification indicates that “electronic device” encompasses 3D pointing devices as well as, e.g., smartphones and navigation equipment, and therefore is the broader term. Ex. 1001, 13:20– 23. At this stage of the proceeding, we determine that the threshold question of institution can be decided under either construction, because Patent Owner does not dispute that the primary asserted reference, Bassompiere, teaches a “spatial reference frame” associated with a 3D pointing device. Pet. 25–27. Therefore, at this stage of the proceeding, we decline to resolve the parties’ dispute. See Vivid Techs., Inc. v. Am. Sci. & Eng'g, Inc., 200 F.3d 795, 803 (Fed. Cir. 1999) (“[O]nly those [claim] terms need be construed that are in controversy, and only to the extent necessary to resolve the controversy.”); Nidec Motor Corp. v. Zhongshan Broad Ocean Motor Co., 868 F.3d 1013, 1017 (Fed. Cir. 2017) (approving Board decision not to construe claim language where the construction is not material to the dispute). 2. “predicted axial accelerations” Petitioner does not propose a construction for “predicted axial accelerations,” but, in the concurrent California Litigation, contends that it should be accorded its “plain and ordinary meaning.” Ex. 2007, 3. In subsequent briefing that will be discussed more fully below, Petitioner asserts that its declarant, Dr. Sarrafzadeh, “applied the ‘plain and ordinary’ meaning for all claim terms, including the ‘predicted axial accelerations’ term,” in this proceeding. Paper 14, 1. Petitioner also submits in that briefing that “the term ‘axial acceleration’ (whether predicted or measured) . . . ordinarily encompasses three types of acceleration,” i.e., “linear, centrifugal, and gravitational.” Id. at 3, 4. Patent Owner contends that “predicted axial accelerations” should be construed as “[g]ravitational acceleration along the electronic device’s axes derived from the current quaternion.” Prelim. Resp. 18. Patent Owner asserts that “[t]he claims and specification consistently define ‘predicted axial accelerations’ as gravitational accelerations along the device’s axes at time T, derived from the current quaternion.” Id. (citing Ex. 1001, claim 1, 17:18–30, 17:45–52). Patent Owner further submits that “because ‘predicted axial accelerations’ are computed from the current quaternion they only contain gravitational accelerations along the device’s axes.” Id. at 19 (citing Ex. 2023 ¶ 23). Here too, the threshold question of institution can be decided without” slip op. at 14

  • BurdenDecided for petitioner

    “We disagree with Patent Owner’s characterization. The teaching to use quaternions instead of Euler angles comes from Bassompiere, not Dr. Sarrafzadeh. See Ex. 1006, 20:10–11 (“A first variant embodiment consists in replacing the angles of torsion θ and ψ by a quaternion formulation of the same torsion.”). Rather than supplying a missing limitation, we understand Dr. Sarrafzadeh to be explaining how a person of ordinary skill in the art would have implemented Bassompiere’s teaching to use quaternions instead of Euler angles given that person’s knowledge of quaternion mathematics. Patent Owner also argues that “switching from Euler angles to quaternions is not a routine substitution but requires the reengineering of the EKF.” Prelim. Resp. 28. Patent Owner similarly contends that Dr. Sarrafzadeh “devotes nearly twenty pages of his declaration to rewriting Bassompiere’s Euler-based equations ‘in quaternion form,’ and explaining how to convert them back to Euler angles,” and notes that “[a]s other researchers in the field have confirmed, ‘[w]hile implementing orientation tracking using quaternions provides advantages like avoiding gimbal lock, it is significantly more complex than the Kalman filer using Euler angles.’” Prelim. Resp. 32 (citing Ex. 1002, 31–51; quoting Ex. 2027, 1). Patent Owner thus contends that replacing Euler angles with quaternions “is not a ‘trivial’ substitution.” Id. at 32. But Petitioner does not appear to be arguing that replacing Euler angles with quaternions would have been “trivial” or simple, only that doing so was taught by Bassompiere and within the knowledge and capabilities of a person of ordinary skill in the art. Pet. 33–34. We determined above that a skilled artisan had knowledge of extended Kalman filters and quaternion mathematics, and we are required to consider the knowledge and capabilities of a person of ordinary skill in our analysis. Further, at this preliminary stage, Patent Owner’s assertion that the Euler angle/quaternion switch would not have been a routine substitution is supported only with attorney argument, which is entitled to no weight. Icon Health & Fitness, Inc. v. Strava, Inc. 849 F.3d 1034, 1043 (Fed. Cir. 2017). As such, it does not outweigh Dr. Sarrafzadeh’s contrary testimony. See, e.g., Ex. 1002 ¶ 56.” slip op. at 29

  Claim constructioncites Phillips · KSR · Graham
  Patents in suitUS 11,698,687
• Samsung Electronics Co., Ltd. v. CM HK LimitedInstituted
  PTAB · Dec 17, 2025 · IPR2025-01023 · APJ Benjamin D M Wood · IPR · Institution

  The Board instituted IPR on all asserted grounds against claims 1, 3, 7, and 9, finding a reasonable likelihood that Petitioner would prevail on at least one challenged claim.

  RulingsInstitution decision

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

    “c. Conclusion as to Claim 1 Having reviewed the record and the parties’ arguments, we determine that Petitioner has a reasonable likelihood of prevailing with respect to claim 1, and therefore has satisfied the threshold requirement for institution of inter partes review on the basis of Ground 1. 3. Claims 3, 7, and 9 Petitioner contends that Bassompiere teaches the limitations of claim 3, 7, and 9, and supports its contentions with citations to Bassompiere and to Dr. Sharrafzadeh’s declaration. Pet. 57–63. At this stage of the proceeding, Patent Owner does not raise any arguments specifically directed to these claims. “When instituting inter partes review, the Board will authorize the review to proceed on all of the challenged claims and on all grounds of unpatentability asserted for each claim.” 37 C.F.R. § 42.108(a). We must “either (1) institute as to all claims challenged in the petition and on all grounds in the petition, or (2) institute on no claims and deny institution.” CTPG at 5–6, 64; see also PGS Geophysical AS v. Iancu, 891 F.3d 1354, 1359–60 (Fed. Cir. 2018) (stating a decision to institute is “a simple yes-orno institution choice respecting a petition, embracing all challenges included in the petition”). Thus, because we have decided to grant institution on Ground 1 with respect to claim 1, we must do the same for claims 3, 7, and 9.” slip op. at 38

  • Skill levelSkill level petitioner adoptedDecided for petitioner

    “Patent Owner does not offer any reason why we should deviate from the Board’s determinations in the prior IPRs that one of ordinary skill in the art would have had knowledge of Kalman filters and quaternion mathematics. Nor are we aware of any such reason. On the contrary, the Board’s prior determinations are consistent with the level of ordinary skill reflected by prior art of record. See Okajima v. Bourdeau, 261 F.3d 1350, 1355 (Fed. Cir. 2001); In re GPAC Inc., 57 F.3d 1573, 1579 (Fed. Cir. 1995); In re Oelrich, 579 F.2d 86, 91 (CCPA 1978). Bassompiere, for example, teaches using a data merging algorithm that is, “[a]dvantageously,” extended Kalman filtering. Ex. 1006, 4:17. Bassompiere also teaches using quaternions to determine a device’s pitch and roll about a horizontal reference frame. Id. at 6:3–8, 20:10–21:1. Nasiri teaches that quaternions can be used to represent a device’s “orientation in space.” Ex. 1008, 30:27– 30. Patent Owner argues that Dr. Sarrafzadeh’s testimony regarding the level of skill in the art in this proceeding contradicts his testimony in the prior IPRs, which did not include knowledge of Kalman filters and quaternion mathematics in his definition of the level of ordinary skill in the art. Prelim. Resp. 24–26. Patent Owner asserts that this contradiction “undermin[es] his credibility.” Id. at 26. We disagree. The testimony Dr. Sarrafzadeh provided in the earlier IPRs obviously preceded the Board’s determinations in those proceedings that, on the whole record, including the testimony of then-Patent Owner’s declarant, the level of ordinary skill included knowledge of Kalman Filters and quaternions. Dr. Sarrafzadeh’s testimony in this proceeding reasonably aligns with those determinations. Accordingly, for the above reasons, we adopt Petitioner’s definition of the level of ordinary skill in the art for purposes of this Decision.” slip op. at 13

  • Expert testimonyPetitioner expert creditedDecided for petitioner

    “We disagree with Patent Owner’s characterization. The teaching to use quaternions instead of Euler angles comes from Bassompiere, not Dr. Sarrafzadeh. See Ex. 1006, 20:10–11 (“A first variant embodiment consists in replacing the angles of torsion θ and ψ by a quaternion formulation of the same torsion.”). Rather than supplying a missing limitation, we understand Dr. Sarrafzadeh to be explaining how a person of ordinary skill in the art would have implemented Bassompiere’s teaching to use quaternions instead of Euler angles given that person’s knowledge of quaternion mathematics. Patent Owner also argues that “switching from Euler angles to quaternions is not a routine substitution but requires the reengineering of the EKF.” Prelim. Resp. 28. Patent Owner similarly contends that Dr. Sarrafzadeh “devotes nearly twenty pages of his declaration to rewriting Bassompiere’s Euler-based equations ‘in quaternion form,’ and explaining how to convert them back to Euler angles,” and notes that “[a]s other researchers in the field have confirmed, ‘[w]hile implementing orientation tracking using quaternions provides advantages like avoiding gimbal lock, it is significantly more complex than the Kalman filer using Euler angles.’” Prelim. Resp. 32–33 (citing Ex. 1002, 31–51; quoting Ex. 2027, 1). Patent Owner thus contends that replacing Euler angles with quaternions “is not a ‘trivial’ substitution.” Id. at 33. But Petitioner does not appear to be arguing that replacing Euler angles with quaternions would have been “trivial” or simple, only that doing so was taught by Bassompiere and within the knowledge and capabilities of a person of ordinary skill in the art. We determined above that a skilled artisan had knowledge of extended Kalman filters and quaternion mathematics such knowledge, and we are required to consider the knowledge and capabilities of a person of ordinary skill in our analysis. Further, at this preliminary stage, Patent Owner’s assertion that the Euler angle/quaternion switch would not have been a routine substitution is supported only with attorney argument, which is entitled to no weight. Icon Health & Fitness, Inc. v. Strava, Inc. 849 F.3d 1034, 1043 (Fed. Cir. 2017). As such, it does not outweigh Dr. Sarrafzadeh’s contrary testimony. See, e.g., Ex. 1002 ¶ 56.” slip op. at 30

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

    “The parties agree that the claimed “spatial reference frame” is associated with a device, has its origin at the same point in the device, and has axes that are always fixed with respect to the device. The only disagreement is whether that device is a “3D pointing device” or an “electronic device.” The Specification indicates that “electronic device” encompasses 3D pointing devices as well as, e.g., smartphones and navigation equipment, and therefore is the broader term. Ex. 1001, 8:35–39. At this stage of the proceeding, we determine that the threshold question of institution can be decided under either construction, because Patent Owner does not dispute that the primary asserted reference, Bassompiere, teaches a “spatial reference frame” associated with a 3D pointing device. Pet. 30–31. Therefore, at this stage of the proceeding, we decline to resolve the parties’ dispute. See Vivid Techs., Inc. v. Am. Sci. & Eng'g, Inc., 200 F.3d 795, 803 (Fed. Cir. 1999) (“[O]nly those [claim] terms need be construed that are in controversy, and only to the extent necessary to resolve the controversy.”); Nidec Motor Corp. v. Zhongshan Broad Ocean Motor Co., 868 F.3d 1013, 1017 (Fed. Cir. 2017) (approving Board decision not to construe claim language where the construction is not material to the dispute).” slip op. at 15

  Claim construction§ 103 obviousnessDiscretionary denialcites Phillips · KSR · Graham
  Patents in suitUS 10,852,846
• Reolink Innovation Inc. / Shenzhen Reolink Technology Co., Ltd. v. Throughtek Technology (Shenzhen) Co., Ltd. And Throughtek Co., Ltd.All claims unpatentable
  PTAB · Dec 15, 2025 · IPR2024-01193 · APJ David C Mckone · IPR · Final written decision

  Claims 1–3, 5, 7–13, 15–19, and 23–25 are unpatentable: claims 1, 7, 8, 10, 11, 15, 16, 18, 19, and 23–25 as anticipated by Zhang; all challenged claims also as obvious over at least one …

  RulingsFinal written decision

  • Skill levelSkill level petitioner adoptedDecided for petitioner

    “person of ordinary skill in the art “would have had a bachelor’s degree in electrical engineering and two years of work experience with network and communication technologies.” Pet. 5 (citing Ex. 1003 ¶¶ 13–15). Patent Owner does not contest Petitioner’s proposal or provide a proposal of its own. On the complete record, we adopt Petitioner’s description of the level of ordinary skill in the art, as it is consistent with the technology described in the ’448 patent and the asserted prior art. See Okajima v. Bourdeau, 261 F.3d 1350, 1355 (Fed. Cir. 2001).” slip op. at 11

  • Claim Construction › Threshold & procedure › Whether a term needs construction (O2 Micro)No construction neededTerm construed board ownMixed

    “construction of “feature flag” is inconsistent with the language of claim 8, which states that “the feature flag indicates that the running state of the second apparatus is the sleep state.” Petitioner also argues that Patent Owner’s proposal is not supported by claim 24, which depends from claim 23 and states that “the feature flag is located at a header of the sleep login packet.” Id. at 3. We agree with Petitioner. The plain language of claim 8 states what a feature flag indicates. Claim 24 recites where the feature flag is located. Neither claim suggests any of Patent Owner’s additional limitations.” slip op. at 13

  • Expert testimonyPetitioner expert creditedDecided for petitioner
  • Novelty / Anticipation (§102) › Anticipation standard (single reference, every element)UnpatentableUnpatentable

    “[A] prior art reference will anticipate if it ‘disclose[s] each and every element of the claimed invention . . . arranged or combined in the same way as in the claim.’” Blue Calypso, LLC v. Groupon, Inc., 815 F.3d 1331, 1341 (Fed. Cir. 2016) (quoting In re Gleave, 560 F.3d 1331, 1334 (Fed. Cir. 2009) (alteration by Federal Circuit)). “However, a reference can anticipate a claim even if it ‘d[oes] not expressly spell out’ all the limitations arranged or combined as in the claim, if a person of skill in the art, reading the reference, would ‘at once envisage’ the claimed arrangement or combination.” Id. (quoting Kennametal, Inc. v. Ingersoll Cutting Tool Co., 780 F.3d 1376, 1381 (Fed. Cir. 2015) (alteration by Federal Circuit); In re Petering, 301 F.2d 676, 681 (CCPA 1962)). For the reasons explained below, we are persuaded that Petitioner has shown, by a preponderance of the evidence, that claims 1, 7, 8, 10, 11, 15, 16, 18, 19, and 23–25 are anticipated by Zhang. slip op. at 16

  Patent outcomesUS 10,602,448 unpatentable
  Claim construction§ 102 anticipation§ 103 obviousnesscites Phillips · Graham
  Patents in suitUS 10,602,448
• Reolink Innovation Inc. / Shenzhen Reolink Technology Co., Ltd. v. Throughtek Co. Ltd.Instituted
  PTAB · Dec 12, 2025 · IPR2025-01327 · APJ Sheila F Mcshane · IPR · Institution

  The Board instituted IPR of claims 1–19 on all asserted grounds, finding a reasonable likelihood of prevailing on the Schwan-Lee and Schwan-Lee-Strickland obviousness grounds.

  RulingsInstitution decision

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

    “partes review. See 35 U.S.C. § 314; 37 C.F.R. § 42.4(a). Under 35 U.S.C. § 314(a), we may not authorize an inter partes review unless the information in the petition and the preliminary response “shows that there is a reasonable likelihood that the petitioner would prevail with respect to at least 1 of the claims challenged in the petition.” For the reasons stated below, we determine that Petitioner has established a reasonable likelihood that it would prevail with respect to at least one claim. We therefore institute inter partes review as to all of the challenged claims of the ’655 patent and all of the asserted grounds of unpatentability in the Petition.” slip op. at 2

  • Skill levelSkill level petitioner adoptedDecided for petitioner

    “III. ANALYSIS A. Level of Ordinary Skill in the Art Petitioner asserts that a person of ordinary skill in the art: would have had a bachelor’s degree in electrical engineering, computer engineering, computer science, or equivalent, and two years of work experience with network devices and communication technologies. EX1003, ¶¶17–19. Additional education might compensate for less experience, and vice versa. Pet. 4 (citing Ex. 1003 ¶¶ 17–19).” slip op. at 6

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

    “The ’655 patent Specification states that: The topology data table 21 of the online server 20 is mainly recorded with a link data 49 between each of the P2P devices 41– 46 within the P2P device community. The link data 49 refers to the connection relationship between the P2P devices 41–46, which includes, but is not limited to, the connection structure, connection data and/or locations of connection. Ex. 1001, 4:51–57. On this preliminary record, we agree with Petitioner that the term “link data” is a “connection relationship between the P2P devices.” This meaning is consistent with the ordinary meaning of the term within the context of the claim, that is, “link data” means data on the links (connections) between each of the P2P devices, where the Specification provides a more fulsome meaning that the term includes, at least, “the connection structure, connection data and/or locations of connection.” See id. at 4:55–57. We invite the parties to provide additional briefing on the construction of this term during trial.” slip op. at 8

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

    “Lee discloses that the P2P overlay is generated with the overlay generation unit 220 that generates the P2P overlay by analyzing information regarding “the corresponding application service, the peer, and the network,” where the network information “may include a network topology, a maximum bandwidth, a current network usage, [and] a transmission delay time, and the like.” Ex. 1005 ¶ 54. We determine that this disclosure provides support for Mr. Lett’s testimony that “Lee describes techniques for changing an overlay in response to changing network characteristics,” which could be beneficial. Ex. 1003 ¶ 48. Accordingly, on this preliminary record, we find this evidence is sufficient to support a rationale to combine Schwan and Lee. See KSR, 550 U.S. at 401 (“[I]f a technique has been used to improve one device, and a person of ordinary skill in the art would recognize that it would improve similar devices in the same way, using the technique is obvious.”).” slip op. at 13

  Claim construction§ 103 obviousnesscites Phillips · KSR · Graham
  Patents in suitUS 9,727,655
• Juniper Networks, Inc. v. Portsmouth Network Corp.All claims unpatentable
  PTAB · Dec 9, 2025 · IPR2024-00893 · APJ Justin T Arbes · IPR · Final written decision

  Claims 3, 8, 11, 12, 15, 20, 23, and 24 are unpatentable as obvious over Gai and IEEE 1999.

  RulingsFinal written decision

  • Skill levelSkill level petitioner adoptedDecided for petitioner

    “Petitioner argues that at the time of the application for the ’986 patent (January 2002), a person of ordinary skill in the art would have had “a bachelor’s degree in electrical engineering or a related field, plus at least two years of industry experience or graduate-level academic experience with computer networking.” Pet. 20. In the Decision on Institution, the Board agreed with and applied Petitioner’s proposed definition, removing the phrase “at least” to avoid unnecessary ambiguity. Dec. on Inst. 18–19. Patent Owner uses Petitioner’s proposed definition for its Response. PO Resp. 5. Neither party made any further argument regarding the level of ordinary skill in the art in its papers during trial. In the Cisco IPR, we adopted a similar definition, determining that a person of ordinary skill in the art would have had “a bachelor’s degree in computer science, computer engineering, electrical engineering, or in an equivalent field, or approximately two years of experience working in the field of information technology and networking,” where “[l]ack of professional experience can be substituted by additional education, and vice versa.” IPR2024-00505, Paper 29 at 10–11 (alteration in original); see Dec. on Inst. 19 n.7 (noting the proposed definition in the Cisco IPR). Based on the full record developed during trial, including our review of the ’986 patent and the types of problems and solutions described in the ’986 patent and cited prior art, we adopt the same definition of the level of ordinary skill in the art as the Cisco IPR and apply it for purposes of this Petitioner’s similar proposed definition in this proceeding.” slip op. at 12

  • Expert testimonyPetitioner expert creditedDecided for petitioner

    “Gai discloses entering an Enable_Uplinkfast command at an access switch (e.g., access switch 114) to block a failed port (e.g., the root port) and configure the access switch to send dummy traffic upstream through a new active port. . . . When modified in view of IEEE 1999’s disclosure that self-healing network traffic can advantageously be sent both upstream and downstream, the command would be entered at a backbone switch (e.g., backbone switch 122) to block a failed port (e.g., a designated port connected to access switch 114) and configure the backbone switch to send dummy traffic downstream to an access switch (e.g. access switch 114) through a new active port. While Gai uses its protocol signaling command, Enable_Uplinkfast, to send dummy traffic through a new root port, [a person of ordinary skill in the art] would deem it an obvious implementation detail to modify the parameters of the port on a backbone switch. See Ex. 1003 ¶ 139 (citing Ex. 1005, col. 6, ll. 39–46).” slip op. at 34

  • Prior constructionPrior construction adoptedDecided for petitioner

    “In the Cisco IPR, we addressed four claim terms in the final written decision: “access switch” and “edge switch,” which appear in independent claims 1 and 13 and various dependent claims, and “downstream” and “upstream,” which appear in claims 11, 12, 23, and 24. IPR2024-00505, Paper 29 at 11–14. We interpreted “access switch” to mean “a switch with ports that connect to LANs and/or to other network endpoints, such as user computer systems,” interpreted “edge switch” to mean “a core switch that is directly connected to an access switch,” interpreted “downstream” to mean “away from the root switch,” and interpreted “upstream” to mean “toward the root switch.” Id. As noted above, Patent Owner did not appeal that decision. We incorporate herein our previous analysis in the Cisco IPR, but note that none of the analysis of the disputed issues below depends on such determine whether Petitioner has met its burden to prove unpatentability of the challenged claims. See Nidec Motor Corp. v. Zhongshan Broad Ocean Motor Co., 868 F.3d 1013, 1017 (Fed. Cir. 2017) (“Because we need only construe terms ‘that are in controversy, and only to the extent necessary to resolve the controversy,’ we need not construe [a particular claim limitation] where the construction is not ‘material to the . . . dispute.’” (emphasis added) (citation omitted)).” slip op. at 13

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

    “1999, supported by the testimony of Mr. McNair, which we credit, is persuasive. See Pet. 25–30, 40–46; Ex. 1003 ¶¶ 132–145, 165–174. Based on the full trial record, we find that Gai and IEEE 1999 teach limitation [1E] and that a person of ordinary skill in the art would have been motivated to combine their teachings in the manner described by Petitioner. Based on all of the evidence of record, we determine that Petitioner has proven, by a preponderance of the evidence, that claim 3 would have been obvious over Gai and IEEE 1999 under 35 U.S.C. § 103(a). 4. Claims 8, 15, and 20 Claim 8 depends indirectly from independent claim 1. Claims 15 and 20 depend indirectly from independent claim 13, which is similar to claim 1 but recites a network switching device rather than a method. As to independent claim 13, Patent Owner refers to its earlier arguments regarding claim 1, asserting that limitation [13C] is “substantially similar” to limitation [1E]. PO Resp. 14–15. We disagree with Patent Owner’s arguments for the reasons explained above. See supra Section II.D.3.b. Patent Owner does not argue dependent claims 8, 15, and 20 separately from their respective parent claims 1 and 13. See PO Resp. 19. We have reviewed Petitioner’s contentions and supporting evidence, including the testimony of Mr. McNair, and are persuaded that Petitioner has proven, by a preponderance of the evidence, that claims 8, 15, and 20 would have been obvious based on Gai and IEEE 1999 under 35 U.S.C. § 103(a), for the reasons stated by Petitioner. See Pet. 21–46, 48–52, 55–59; Ex. 1003 ¶¶ 113–175, 179–185, 194–203.” slip op. at 41

  Patent outcomesUS 6,917,986 unpatentable
  Claim construction§ 103 obviousnesscites KSR · Graham
  Patents in suitUS 6,917,986

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.