Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12281380 | CRN coating film and sliding member | Syun Sugawara | 2025-04-22 |
| 11242929 | Piston ring | Tomoyuki Sato, Yutaka Kitazume | 2022-02-08 |
| 9175771 | Piston ring | Tomoyuki Sato | 2015-11-03 |
| 6325385 | Piston ring | Nobuyuki Yamashita | 2001-12-04 |
| 6279913 | Sliding member and manufacturing method thereof | Nobuyuki Yamashita | 2001-08-28 |
| 6142481 | Piston ring | Nobuyuki Yamashita | 2000-11-07 |
| 6139022 | Piston ring | Nobuyuki Yamashita | 2000-10-31 |