- Shenzhen Tuozhu Technology Co. Ltd. v. Stratasys, Inc.Institution deniedPTAB · Oct 6, 2025 · IPR2025-00585 · APJ Lilan Ren · IPR · Institution
The Board denied institution on claims 1–6, 10–19 because claim 1’s scope is ambiguous and the petition did not show a reasonable likelihood of prevailing on any asserted obviousness ground.
RulingsInstitution decision- PTAB / AIA Trials › Institution threshold (reasonable likelihood / more likely than not)Institution denied meritsInstitution denied
“review. See 35 U.S.C. § 314 (2024); 37 C.F.R. § 42.4(a) (2024). Institution of an inter partes review requires that “the information presented in the petition . . . and any 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.” 35 U.S.C. § 314(a). For the reasons set forth below, we determine that the scope of claim 1 is ambiguous and that there is not a reasonable likelihood that Petitioner will prevail with respect to at least one challenged claim, and we deny inter partes review.1” slip op. at 2
- Claim Construction › Threshold & procedure › Whether a term needs construction (O2 Micro)Term construed board ownOther
“distinguishes and contrasts build material property from operational parameters. The diagnostic test passage therefore only describes a diagnostic test of the build material property but does not describe a subsequent diagnostic test to assess whether an operational parameter is suitable for the printer. Based solely on the diagnostic test passage and the prosecution history, a possible interpretation may be that the operational parameter determination in claim element 1b encompasses the diagnostic testing in claim element 1c. That is, “performing a diagnostic test to determine whether the operational parameter is suitable for the three-dimensional printer” in claim element 1c is subsumed as part of “determining an operational parameter of a fabrication process using the three-dimensional printer based upon the data, the operational parameter including at least one of a build platform temperature, a build volume temperature, an infill requirement, a rafting requirement, a support structure requirement, and a cooling requirement” in claim element 1b.” slip op. at 15
- Disclosure Requirements (§112) › Written description (Ariad)Not entitled to earlier dateOther
“benefit of the filing date of an earlier filed application only if the disclosure of the earlier application provides support for the claims of the later application, as required by 35 U.S.C. § 112.” PowerOasis, Inc. v. T-Mobile USA, Inc., 522 F.3d 1299, 1306 (Fed. Cir. 2008); see also Research Corps. Techs. v. Microsoft Corp., 627 F.3d 859, 871–72 (Fed. Cir. 2010) (holding that claims of the later-filed application, which were not limited to a “blue noise mask,” were “not entitled to claim the benefit of their parent applications’ filing dates”); ICU Med., Inc. v. Alaris Med. Sys., 558 F.3d 1368, 1377–78 (Fed. Cir. 2009) (holding that “spikeless” claims “added years later during prosecution” were not supported by the specification which “describe[d] only medical valves with spikes”); Tronzo v. Biomet, Inc., 156 F.3d 1154, 1158–60 (Fed. Cir. 1998) (holding the generic shaped cup claims of the later-filed child application were not entitled to the filing date of the parent application that “disclosed only a trapezoidal cup and nothing more”). “To satisfy the written description requirement the disclosure of the prior application must convey with reasonable clarity to those skilled in the art that, as of the filing date sought, [the inventor] was in possession of the invention.” PowerOasis, 522 F.3d at 1306 (emphasis omitted; alteration in original). The sufficiency of written description support is based on “an objective inquiry into the four corners of the specification from the perspective of a person of ordinary skill in the art.” Ariad Pharm., Inc. v. Eli Lilly & Co., 598 F.3d 1336, 1351 (Fed. Cir. 2010) (en banc).” slip op. at 20
- Skill levelSkill level petitioner adoptedDecided for petitioner
“Petitioner contends that a person of ordinary skill in the art in the field in the relevant time frame would have had “(1) at least a bachelor’s degree in Mechanical Engineering, Computer Engineering, Chemical Engineering, Materials Science, or a related field, and (2) at least two years of research or industry experience in 3D printing or materials used for 3D printing.” Pet. 5 (citing Ex. 1003 ¶ 20). Petitioner also contends that “[a]dditional experience could substitute for a formal degree or formal training (and vice versa).” Id. (citing the same). Patent Owner contends that an ordinarily skilled artisan “would have had a bachelor’s degree in Mechanical Engineering, Computer Engineering, Electrical Engineering, Chemical Engineering, Materials Science, or a comparable field and at least two years of experience related to 3D printing, with additional experience potentially being a substitute for a formal degree or training (and vice versa).” Prelim. Resp. 12. For purposes of this decision, we adopt Petitioner’s definition of the level of ordinary skill in the art as it appears unopposed and consistent with the disclosures of the ’464 patent and the prior art of record. See Okajima v. Bourdeau, 261 F.3d 1350, 1355 (Fed. Cir. 2001).” slip op. at 9
Claim construction§ 112 disclosurecites Phillips · KSR · GrahamPatents in suitUS 11,167,464 - Twitter, Inc. v. Palo Alto Research Center LLCAll claims unpatentablePTAB · Mar 22, 2023 · IPR2021-01430 · APJ Christopher L Ogden · IPR · Final written decision
Claims 1–5, 7–11, 13–17, 19, and 20 are unpatentable under § 103; PARC’s contingent motion to amend is denied because the proposed substitute claims lack written-description support and are unpatentable.
RulingsFinal written decision- Skill levelSkill level petitioner adoptedOther
“Relying on Dr. Turnbull’s testimony, Twitter argues that a person of ordinary skill in the art “would at minimum have a bachelor’s in software, computer, or electrical engineering or computer science with at least two years’ experience in software development, including with respect to context-aware devices and systems, or the equivalent.” Pet. 16 (citing Ex. 1003 ¶ 24). Also, “[a]dditional graduate education could substitute for professional experience, or significant experience in electronic messaging could substitute for formal education.” Id. (citing Ex. 1003 ¶ 24). For this proceeding, PARC does not dispute this proposed level of ordinary skill. PO Resp. 21. Because Twitter’s uncontroverted articulation of the level of ordinary skill in the art is supported by testimonial evidence and appears consistent with the types of problems and solutions in the ’439 patent, we adopt it for this decision. See, e.g., Ex. 1001, 1:4–33 (“Background” section of the ’439 patent, describing the field and related art as relating to the use of contextual data in computer systems).” slip op. at 9
- Claim Construction › Threshold & procedure › Whether a term needs construction (O2 Micro)No construction neededOther
“We agree as to Twitter’s last point, as we discuss below, that Cheng teaches a graph-based model that stores data in memory on a per-user basis. See infra Section IV.C.4(a); Ex. 1005, Fig. 7. Moreover, this decision does not address grounds of the Petition that omit Cheng as a reference, Cheng discloses a “context graph” under either party’s construction. Thus, we need not construe the term for this decision. See Nidec, 868 F.3d at 1017. Because the terms “recommender” and “application event data and/or operating system data” are not contested and are not material to our decision, we do not construe these two terms. 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))). To the extent that other claim terms are significant, we discuss them below in the context of the asserted prior art.” slip op. at 12
- Obviousness (§103) › Motivation to combine / reasonable expectation of successMotivation foundReasonable expectation foundUnpatentable
“We determine that Twitter has persuasively, and with sufficient specificity, shown that the combination of Huomo and Cheng teaches all aspects of limitation 13[d], and that it would have been obvious to modify Huomo by using Cheng’s personal interest graph as the model for how facts and assertions are stored in Huomo’s “blackboard.” This modification would have been compatible with Huomo and would simply affect the form of the information, or types of information, that are stored in Huomo’s blackboard. See Intel Corp., v. PACT XPP Schweiz AG, No. 2022-1037 at 10–13 (Fed. Cir. Mar. 13, 2023) (there is motivation to combine where one reference addresses a problem in one way, and another reference addresses the same problem in an alternative way that would be a suitable option). We agree with Twitter that this modification would have been within the ordinary skill in the art, that there would have been a reasonable expectation of success, and that an ordinarily skilled artisan would have recognized benefits to using Cheng’s graph-based structure such as the ability to better track social relationships through annotating the nodes and edges, and the ability to more easily track users’ shared interests and the influences that users may have on each other. See Pet. 53–55; Ex. 1003 ¶¶ 156–161.” slip op. at 30
- Obviousness (§103) › Motivation to combine / reasonable expectation of success › HindsightDecided for petitioner
“We determine that Twitter has persuasively, and with sufficient specificity, shown that the combination of Huomo and Cheng teaches all aspects of limitation 13[d], and that it would have been obvious to modify Huomo by using Cheng’s personal interest graph as the model for how facts and assertions are stored in Huomo’s “blackboard.” This modification would have been compatible with Huomo and would simply affect the form of the information, or types of information, that are stored in Huomo’s blackboard. See Intel Corp., v. PACT XPP Schweiz AG, No. 2022-1037 at 10–13 (Fed. Cir. Mar. 13, 2023) (there is motivation to combine where one reference addresses a problem in one way, and another reference addresses the same problem in an alternative way that would be a suitable option). We agree with Twitter that this modification would have been within the ordinary skill in the art, that there would have been a reasonable expectation of success, and that an ordinarily skilled artisan would have recognized benefits to using Cheng’s graph-based structure such as the ability to better track social relationships through annotating the nodes and edges, and the ability to more easily track users’ shared interests and the influences that users may have on each other. See Pet. 53–55; Ex. 1003 ¶¶ 156–161.” slip op. at 30
Patent outcomesUS 9,208,439 unpatentableClaim construction§ 103 obviousness§ 112 disclosurecites Phillips · KSR · GrahamPatents in suitUS 9,208,439
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.