US PTAB IP Litigation
8,722 annotated decisions
Page 2 of 364 · 8,722 total
patent · Apr 14, 2026
Samsung Electronics Co., Ltd. et al. v.--
· PGR2026-00043
Samsung has filed a PGR petition seeking cancellation of Whirlpool’s 12,543,922 dishwasher rack patent on obviousness and indefiniteness grounds, relying on multiple prior‑art references.
patent · Apr 14, 2026
Tricam Industries, LLC v.--
· PGR2026-00044
Tricam Industries filed a PGR petition for U.S. Patent 12,359,506, providing a corrected exhibit list that includes prior patents and a related Federal Circuit case.
patent · Apr 14, 2026
Tricam Industries, LLC v.--
· PGR2026-00044
Tricam Industries has filed a Post‑Grant Review petition challenging all 13 claims of Little Giant Ladder Systems' ‘506 patent covering articulated ladder hinges. The petition alleges obviousness, lack of written description, and indefiniteness, and argues that the examiner erred in granting the patent.
patent · Apr 13, 2026
Samsung Electronics Co., Ltd. et al. v.--
· IPR2026-00336
Samsung Electronics has filed an IPR petition challenging Whirlpool's 2025 dishwasher patent (US 12,232,681), seeking to invalidate claims 14‑16 and 19 as obvious over prior‑art references Carr, Mailander, and Ochoa.
patent · Apr 3, 2026
Cisco Systems, Inc. v.--
· IPR2026-00266
Cisco has filed an IPR petition seeking to invalidate Zugara’s AR video‑chat patent, asserting that its claims are obvious over the Rosenthal and Vesely publications. The petition lists 29 claims and relies on 35 U.S.C. §103.
patent · Apr 2, 2026
X Corp. v.Search & Share Technologies, LLC
· IPR2026-00235
X Corp. has filed an IPR petition seeking cancellation of all 20 claims of the ’744 patent, alleging anticipation and obviousness over Palmon, Walther, and Lu. The petition invokes §§ 102 and 103 and requests institution of review.
patent · Mar 31, 2026
Google LLC v.--
· IPR2026-00304
Google has filed an IPR petition seeking to invalidate claims 1‑16 of U.S. Patent 8,438,120, which covers hyper‑parameter optimization for machine‑learning classifiers. The petition relies on five prior‑art references to argue anticipation and obviousness, and asks the PTAB to institute the trial.
patent · Mar 31, 2026
Entegris, Inc. v.--
· PGR2026-00037
Entegris has filed a PGR petition challenging U.S. Patent 12,347,711, which covers a wafer‑container gas diffusion device. The company alleges anticipation, obviousness, and indefiniteness over its own prior‑art references and seeks cancellation of all 31 claims.
patent · Mar 31, 2026
Samsung Electronics Co., Ltd. et al. v.--
· IPR2026-00324
Samsung Electronics petitions the PTAB to invalidate TopWire's 9,859,202 PoP patent, asserting that all claim limitations are anticipated or obvious over earlier packaging references such as Sun and Chen. The petition includes detailed claim constructions and requests cancellation of the challenged claims.
patent · Mar 30, 2026
Krisp Technologies, Inc. v.Sanas.AI, Inc.
· PGR2026-00033
Krisp Technologies petitions the PTAB to invalidate Sanas.AI’s 12,417,756 patent covering real‑time accent mimicking, asserting that all 20 claims are obvious over a suite of prior‑art speech‑processing references.
patent · Mar 30, 2026
Cisco Systems, Inc. v.--
· IPR2026-00321
Cisco has filed a petition to institute an IPR against OptimNet’s U.S. Patent 9,313,101, asserting that claims 1‑6 are obvious over the Mo and Peng references. The petition seeks cancellation of the challenged claims.
patent all challenged claims unpatentable · Mar 27, 2026
Google LLC v.--
· IPR2026-00271
Google and Samsung successfully challenged 27 claims of Headwater's ’733 patent, with the PTAB finding all claims unpatentable as obvious over MMS standards and known encryption technology.
patent · Mar 27, 2026
Krisp Technologies, Inc. v.Sanas.AI, Inc.
· IPR2026-00272
Krisp Technologies has filed an Inter Partes Review petition challenging Sanas.AI’s U.S. Patent No. 11,948,550, which claims a machine‑learning system for real‑time accent conversion. The petitioner alleges obviousness over six prior‑art references and proposes a specific claim construction for “fourth audio data representative of.”
patent · Mar 27, 2026
Google LLC v.--
· IPR2026-00271
Google has filed an IPR petition seeking cancellation of all 14 claims of Headwater Research’s ’564 patent covering a mobile device with secure MMS messaging. The petition relies on obviousness arguments combining TS‑23.140, Rakic and several other references.
patent · Mar 27, 2026
Cisco Systems, Inc. v.--
· IPR2026-00320
Cisco Systems has filed a petition for inter partes review of U.S. Patent 8,780,887, asserting that its ten claims are obvious over the Pankratov prior‑art reference. The petition seeks institution of the IPR and cancellation of the challenged claims.
patent · Mar 27, 2026
Cisco Systems, Inc. v.--
· IPR2026-00322
Cisco has filed a petition for inter partes review of U.S. Patent 10,020,961, asserting that all 13 claims are obvious over the Ye reference. The petition seeks institution of the IPR and cancellation of the claims.
patent · Mar 26, 2026
Krisp Technologies, Inc. v.Sanas.AI, Inc.
· IPR2026-00273
Krisp Technologies has filed an IPR petition challenging Sanas.ai’s U.S. Patent No. 12,125,496 covering neural‑network‑based voice enhancement. The petition asserts that all 20 claims are obvious over a combination of prior‑art references and proposes a specific construction for the term “low‑dimensional representation.”
patent · Mar 25, 2026
Par Health, Inc. v.InfoRLife, S.A.
· PGR2026-00036
Par Health petitions the PTAB to institute a post‑grant review of U.S. Patent 12,370,153 covering ready‑to‑use ketamine infusion formulations. The petition asserts anticipation by a Biomed data sheet and obviousness over Biomed combined with standard pharmaceutical references and commercial infusion bag literature.
patent · Mar 24, 2026
Altria Client Services LLC v.--
· PGR2026-00035
Altria Client Services LLC petitions the PTAB to cancel a design patent for a dog‑toy set that mimics Marlboro cigarette packaging, citing a 1959 Life Magazine ad and a 1976 trademark registration as prior art.
patent · Mar 23, 2026
Merck Sharp & Dohme LLC v.Halozyme, Inc. et al.
· IPR2026-00312
Merck challenges Halozyme’s PH20 enzyme patent, asserting that a 2013 publication anticipates all 18 claims and that the specification lacks written description and enablement. The petition seeks inter partes review under § 102 and § 112(a).
patent · Mar 23, 2026
Merck Sharp & Dohme LLC v.Halozyme, Inc. et al.
· IPR2026-00313
Merck Sharp & Dohme LLC has filed an IPR petition challenging Halozyme’s U.S. Patent 11,041,149 covering engineered PH20 hyaluronidase proteins. The petition alleges lack of written description, enablement, and anticipates all claims under prior art US‑275.
patent · Mar 23, 2026
Merck Sharp & Dohme LLC v.Halozyme, Inc. et al.
· IPR2026-00314
Merck has filed an IPR petition challenging Halozyme’s ’656 patent covering engineered PH20 hyaluronidase proteins. The petition asserts lack of written description and enablement and that US‑275 anticipates all claims.
patent · Mar 23, 2026
Amazon.com Services LLC et al. v.Smart Speaker LLC
· IPR2026-00280
Amazon has filed an IPR petition challenging 27 claims of Smart Speaker’s ’720 patent, asserting obviousness over a suite of prior‑art references covering microphones, WLAN, speakers, and lighting. The petition highlights a deficient examiner search and seeks cancellation of all challenged claims.
patent · Mar 20, 2026
Accord BioPharma, Inc. et al. v.Janssen Biotech, Inc. et al.
· IPR2026-00259
Accord BioPharma petitions the PTAB to invalidate claims 1‑7 of Janssen’s anti‑TNF antibody patent, asserting anticipation and obviousness based on Janssen’s own clinical‑trial data and FDA‑approved labeling.
