Osaka District Court, Reiwa 7 (Wa) 12280 [Seawall] <Presiding Judge Takemiya>
Article information
Content type: Case note
Categories: Patents
Issues: Claim interpretation / Infringement / Proof
First published on this site: 2026-10-03
Display and classification checked: 2026-10-03
Osaka District Court, Reiwa 7 (Wa) 12280 [Seawall] <Presiding Judge Takemiya>
In view of the specification and the meaning of the terminology, “packing for watertightness between the transparent resin plate and the frame” (element B③) does not mean that “it is sufficient for packing to exist in even part of the space between the transparent resin plate and the frame.” It requires “packing that makes the entire interface between the transparent resin plate and the frame watertight (preventing water leakage).”
⇒ Claim element not satisfied (the defendant's “rubber gasket” alone did not make the whole interface watertight).
+ Even treating the aluminum “retaining strip” as metal packing, proof of watertightness was insufficient.
Cf. Heisei 30 (Ne) 10034 [Solenoid] <Presiding Judge Kanno>
* “Sealing fit” does not require the end member itself to produce the effect of preventing solenoid corrosion.
⇒ The element was satisfied because the effect was produced together with an O-ring.
Original article: https://lnkd.in/gKAdFGsv
Original source shown in the LinkedIn preview: https://www.courts.go.jp/assets/hanrei/hanrei-pdf-93806.pdf
Originally posted on LinkedIn: https://www.linkedin.com/feed/update/urn:li:activity:7511583114226380801/
Update and correction history
Dated entries are added for corrections, supplements, classification, display, and related-article changes, separately from the first publication date.
2026-10-03: First publication on this site from the LinkedIn original.
Consultation guide by purpose: https://www.takaishihideki.com/en/single-post/consultation-guide-en
