Patent Case Law and Intellectual Property Practice Blog

日本語原文 / Japanese original Article information Article type: Case note Category: Patents Topics: Inventive step, Motivation and teaching away, Doctrine of equivalents First published on this website: 2026-11-01 Display and classification checked: November 2, 2026 Originally published on Ameblo: 2024-07-05 (Japan time). Full English translation. https://ameblo.jp/hideki-takaishi/entry-12858729219.html 2023 (Ne) 10071 [Chip Fuse] <Miyasaka> ⇒ Doctrine of equivalents: not establ

* The defendant simultaneously sold an “electric straight-pipe bender,” a “bender shoe,” and a “bender guide.” Assembling the three infringed the patent. ⇒ Held to constitute direct infringement!! * The estoppel objection under the fifth requirement was rejected, and equivalence

Numerical rounding and the doctrine of equivalents The issue was whether the appellee’s product, with a molecular weight of 699.91848, satisfied the numerical limitation of a molecular weight of “700 or more.” ⇒ Ultimately, because the applicant had “deliberately” drawn the line

日本語版 Article information Article type: Reports and activities Category: Patents Topics: Inventive step, Doctrine of equivalents, Added matter, Divisional applications, Examination and appeal practice First published on this site: 2026-10-11 Display/classification checked: 2026-10-11 Trial and Appeal Practitioners Study Group Report 2024 — Case 4 (Electrical 1) [Inventive step in business-related inventions] IP High Court, Reiwa 4 (Gyo-Ke) No. 10039 The judgment recognized an

日本語版 Article information Article type: Case note Category: Patents Topics: Doctrine of equivalents First published on this site: 2026-10-11 Display/classification checked: 2026-10-11 IP High Court, Reiwa 7 (Ne) No. 10074 [Reservation Management Device] <Presiding Judge Masuda> *As at first instance, the doctrine of equivalents was rejected. (Excerpt from the judgment; translated) As stated in Section 5(2) of Part III of the “Facts and Reasons” of the cited original judgment,

日本語版 Article information Type: Case note Category: Patents Topics: Claim construction、Doctrine of equivalents First published on this site: 2026-10-09 Case / source information: Osaka District Court, Reiwa 4 (Wa) No. 11025 Display and classification checked: 2026-10-09 Osaka District Court, Reiwa 4 (Wa) No. 11025 — Mite-trapping mat (Judge Matsuami) *A “porous air-permeable bag” must have a structure that retains its contents inside and prevents their dispersal. → Claim limit

日本語版 Article information Article type: Case note Categories: United States Topics: Claim interpretation / Doctrine of equivalents First published on this website: 2026-10-07 Display and classification checked: 2026-10-07 [United States] LAB v. Qiagen (CAFC, August 13, 2025) When claim language differs within a claim depending on whether a modifier is included, the different wording is understood to have been chosen deliberately. Where a claim contains both “partially matching

日本語版: https://www.takaishihideki.com/single-post/linkedin-7512400174837678080-ja Article information Article type: Case note Categories: Patents Issues: Doctrine of equivalents・Claim interpretation First published on this website: October 5, 2026 Case information: Reiwa 6 (Ne) 10076 [Temporary protective fence that can be raised, lowered and stored] <Presiding Judge Nakadaira> Display and classification checked: October 5, 2026 IP High Court, Reiwa 6 (Ne) 10076 [Temporary pro

日本語版を読む / Japanese version Article information Article type: Case note Category: Patents Topics: Doctrine of equivalents, Patent corrections First published on this website: October 2, 2026 Case number (as stated in the source): Osaka District Court, Reiwa 6 (Wa) 6010 Display and classification checked: October 2, 2026 (not a re-review of the legal analysis) Osaka District Court, Reiwa 6 (Wa) 6010 [Network boot system] <Presiding Judge Matsuami> The defendant's product does n

日本語版を読む / Japanese version Article information Article type: Case note Category: Patents Topics: Claim interpretation, Doctrine of equivalents, Patent corrections First published on this website: October 2, 2026 Case number (as stated in the source): Reiwa 6 (Ne) 10033 Display and classification checked: October 2, 2026 (not a re-review of the legal analysis) IP High Court, Reiwa 6 (Ne) 10033 [Eaves] <Presiding Judge Nakadaira> * Appeal dismissed: Claim elements not satisfied