Patent Case Law and Intellectual Property Practice Blog

Japanese version Article information Article type: Publication review Category: Patents Issues: Patent corrections First published on this website: 2026-10-03 Display and classification checked: 2026-10-03 Can correcting “A and/or B” to “B” ever amount to an enlargement or alteration of claim scope? For example: A container capable of carrying 10 cubic centimeters of liquid and/or solid? The reverse pattern is an enlargement or alteration caused by adding wording. For example

Japanese version Article information Article type: Case note Category: Patents Issues: Claim interpretation, Support requirement First published on this website: 2026-10-03 Court: Tokyo District Court Case number: Reiwa 5 (Wa) 70380 Display and classification checked: 2026-10-03 Tokyo District Court, Reiwa 5 (Wa) 70380 [Rod-shaped light] <Presiding Judge Takahashi> Claim elements not satisfied; support requirement violated. The defendant's products 1 and 2 store a color throu

Japanese version Article information Article type: Case note Category: Patents Issues: Inventive step, Numerical limitations and parameters, Motivation and teaching away First published on this website: 2026-10-03 Court: Intellectual Property High Court Case number: Reiwa 6 (Gyo-Ke) 10053 Display and classification checked: 2026-10-03 IP High Court, Reiwa 6 (Gyo-Ke) 10053 [Wood board] <Presiding Judge Hibiki Shimizu> Lacks inventive step. The specification contained no indica

Japanese version Article information Article type: Case note Category: Patents Issues: Inventive step First published on this website: 2026-10-03 Court: Intellectual Property High Court Case number: Reiwa 6 (Ne) 10032 Display and classification checked: 2026-10-03 IP High Court, Reiwa 6 (Ne) 10032 [Mobile information communication device] <Presiding Judge Shimizu> Lacks inventive step. ⇒ First-instance dismissal upheld. At filing, it was common general technical knowledge tha

Japanese version Article information Article type: Case note Classification: Patents Issues: Employee inventions First published on this site: 2026-10-03 Court: Osaka District Court Case number: Reiwa 5 (Wa) 10217 Display/classification checked: 2026-10-03 Osaka District Court, Reiwa 5 (Wa) 10217 [Three-dimensional reticular fiber aggregate] <Presiding Judge Matsuami> Claim for employee-invention remuneration. ⇒ Dismissed. (Excerpts from the judgment, translated) In establish

Japanese version Article information Article type: Case note Classification: Patents Issues: Claim interpretation; Novelty First published on this site: 2026-10-03 Court: Tokyo District Court Case number: Reiwa 5 (Wa) 70449 Display/classification checked: 2026-10-03 Tokyo District Court, Reiwa 5 (Wa) 70449 [Fastening hardware] <Presiding Judge Takahashi> The claim wording “for inducing deformation when an excessive load acts” does not limit the invention's configuration. “It

Japanese version Article information Article type: Case note Classification: Patents Issues: Employee inventions; reasonable remuneration First published on this site: 2026-10-03 Court: Osaka District Court Case number: Reiwa 4 (Wa) 11405 Display/classification checked: 2026-10-03 Osaka District Court, Reiwa 4 (Wa) 11405 [Heterocyclic derivatives] <Presiding Judge Takemiya> [Employee-invention remuneration] Approximately JPY 94 million awarded. * The employee-invention rules

Japanese version Article information Article type: Case note Classification: Patents Issues: Employee inventions First published on this site: 2026-10-03 Court: Tokyo District Court Case number: Reiwa 5 (Wa) 70495 Display/classification checked: 2026-10-03 [Employee inventions] Tokyo District Court, Reiwa 5 (Wa) 70495 <Presiding Judge Nakashima> * Joint inventorship not established. The plaintiff could not establish when the invention had been completed. (Excerpts from the ju

Japanese version Article information Article type: Case note Classification: Patents Issues: Litigation procedure First published on this site: 2026-10-03 Court: Tokyo District Court Case number: Reiwa 5 (Yo) 30214 Display/classification checked: 2026-10-03 Tokyo District Court, Reiwa 5 (Yo) 30214, petition for a provisional injunction <Presiding Judge Sugiura> ★ Before the same presiding judge, Sugiura, the patentee lost in the action on the merits, reversing the earlier out

Japanese version Article information Article type: Case note Classification: Patents Issues: Claim interpretation First published on this site: 2026-10-03 Court: Tokyo District Court Case number: Reiwa 5 (Wa) 70527 Display/classification checked: 2026-10-03 Tokyo District Court, Reiwa 5 (Wa) 70527 [Cyclic protein tyrosine kinase inhibitors] <Presiding Judge Sugiura> The scope of an extended patent right covers the product subject to the regulatory disposition (the originator