IP High Court, Reiwa 6 (Ne) No. 10019 — Rolling device (Judge Miyasaka)
Updated: 3 days ago
Article information
Type: Case note
Category: Patents
Topics: Claim construction
First published on this site: 2026-10-09
Case / source information: IP High Court, Reiwa 6 (Ne) No. 10019 / Tokyo District Court, Reiwa 4 (Wa) No. 18830
Display and classification checked: 2026-10-09
IP High Court, Reiwa 6 (Ne) No. 10019 — Rolling device (Judge Miyasaka)
*The appellate court rejected the narrow construction adopted below (Tokyo District Court, Reiwa 4 (Wa) No. 18830), but found that another claim limitation was not met.
[Claim 1] …forming, in part of the rolling path, an unloaded region in which the rolling element contacts only one of the raceway grooves, …
(Excerpt from the judgment, translated)
The appellee’s products are angular-contact ball bearings used with preload that elastically deforms the balls and inner and outer rings, eliminating gaps between the balls and the inner- and outer-ring raceway grooves. Accordingly, the products do not have “a rolling element contacting only one of the raceway grooves” and cannot be said to “form an unloaded region.”
Original article (2025-09-28):
Originally posted on LinkedIn: https://www.linkedin.com/feed/update/urn:li:activity:7513753623277957121/
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This history records publication, display, and classification changes actually made on this site.
2026-10-09: First published on this site from the LinkedIn original, with classification, article information, and consultation navigation.
2026-10-13: aligned canonical, hreflang, and search-index URLs with the published URLs. The original article text was not changed.
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