IP High Court, Heisei 25 (Gyo-Ke) No. 10266 — Transparent film (Judge Ishii)
Updated: 4 days ago
Article information
Article type: Case note
Category: Patents
Topics: Inventive step, Patent corrections, Added matter
First published on this site: 2026-10-10
Display/classification checked: 2026-10-10
IP High Court, Heisei 25 (Gyo-Ke) No. 10266 — Transparent film (Judge Ishii)
*A claim with a disclaimer does not introduce new technical matter if it does not affect the problem addressed by the invention.
→ Correction requirements satisfied, but inventive step denied after correction.
(Excerpts from the judgment, translated; portions omitted)
[...] The metal oxides used as acid acceptors in Invention 1 include any type possessing that function. The correction excludes certain specifically listed metal oxides from those having that property. There is no circumstance changing the technical content of “metal oxides” used as acid-acceptor particles before and after correction, such as a particular acid-accepting property possessed only by the excluded oxides or only by the remaining oxides. The correction therefore limits the types of metal oxides recited in the claims compared with before correction and does not introduce new technical matter. [...]
Since a solar-cell encapsulating film is a member in contact with equipment suggested in Ko 1, a person skilled in the art reading Ko 1 could readily have conceived of making the film of Invention Ko 1 crosslinked and transparent and using it as a solar-cell encapsulating film. [...] The invention could readily have been conceived by a person skilled in the art based on Invention Ko 1 and well-known technology.
Original article (2025-08-23):
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This history records actual publication, display, and classification changes made on this site.
2026-10-10: First published the LinkedIn original on this site and set the classification, article information, and consultation link.
2026-10-10: Aligned the translation link, canonical URL and hreflang with the verified public URLs.
2026-10-10: Updated topic tags and related-article links. The original article text was not changed.
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