Patent Case Law and Intellectual Property Practice Blog

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): Tokyo District Court, Reiwa 5 (Wa) 70393 Display and classification checked: October 2, 2026 (not a re-review of the legal analysis) Tokyo District Court, Reiwa 5 (Wa) 70393 [Foldable and stowable temporary protective fence] <Presiding Judge Nakashima

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) 10101 Display and classification checked: October 2, 2026 (not a re-review of the legal analysis) IP High Court, Reiwa 6 (Ne) 10101 [Lighting apparatus] <Judge Shoji> <Claim element A: Respective red, blue and green

Explore articles on claim interpretation, the doctrine of equivalents and product-by-process claims. Consult the individual articles and their sources for the facts and discussion of each case.

[Widening structure for a shield tunnel] (Presiding Judge Nakajima) *Claim requirements not satisfied (the doctrine of equivalents also not established).

[Taxi dispatch management system] (Presiding Judge Matsuami) *Claim requirements not satisfied (the doctrine of equivalents also not established). "Taxi (information)" in claim element C means individual vehicles (information about them).