Osaka District Court, Case No. 2024 (Wa) 2606

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Article information

Article type: Case note

Display and classification checked: 2026-09-30

Categories: Patents

Topics: Claim interpretation / Numerical limitations and parameters

Published on this website: 2026-09-29

Osaka District Court, Case No. 2024 (Wa) 2606

[Electric coffee maker] (Presiding Judge Matsuami)

Invention 1 at issue has a configuration in which the heater is turned off when the water temperature inside the boiler reaches 90–100°C, and steam pressure caused by boiling is not generated.

The defendant's product has a configuration in which the heater is turned off after the hot water in the boiler boils and reaches 100.7°C (measured value), and coffee grounds are warmed using vapor pressure (1035.8 hPa) caused by boiling.

⇒ Not satisfied

The claim wording "no remaining hot water is left" means, as its wording states, that no water exists inside the boiler.

Approximately 9 mL of hot water remains in the defendant's product after extraction is complete.

⇒ Not satisfied

https://lnkd.in/gX-fFrHY

https://lnkd.in/gfqGMJpQ

hanrei-pdf-95528.pdf — courts.go.jp

Originally posted on LinkedIn: https://www.linkedin.com/feed/update/urn:li:activity:7509882144861736960/

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Updates and corrections

This log starts on 30 September 2026. Display and classification checks are distinct from a review of the legal analysis.

2026-09-30 — Presentation update: added the article type, this change log and a link to consultation options. The existing article text was preserved.

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