Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10100929 | Piston ring | Keiji Honda, Katsuhiro Tsuji, Takuma Sekiya | 2018-10-16 |
| 10036345 | Combination of cylinder and piston ring | Katsuhiro Tsuji, Akio Shinohara | 2018-07-31 |
| 10036472 | Sliding member and piston ring | — | 2018-07-31 |
| 9644738 | Combination of cylinder and piston ring | Akira Kunimoto | 2017-05-09 |
| 9371797 | Piston ring | Takuma Sekiya, Yuuichi Murayama, Masayuki Sato, Yuji Shima, Junya Takahashi | 2016-06-21 |
| 9347559 | Piston ring | Takuma Sekiya, Yuuichi Murayama, Masayuki Sato, Yuji Shima, Junya Takahashi | 2016-05-24 |
| 8123227 | Sliding member | Minoru Kawanishi, Ryo Wakabayashi, Katsuhiro Tsuji, Takayuki Sato | 2012-02-28 |
| 7955691 | Hard amorphous carbon film | Takashi Matsui, Yoshiharu Utsumi, Hisanori Ohara | 2011-06-07 |
| 7156061 | Valve lifter | Takashi Matsui, Katsuhiro Tsuji, Yutaka Mabuchi, Takahiro Hamada, Hiroyuki Izumi +1 more | 2007-01-02 |
| 6821497 | Amorphous hard carbon film, mechanical parts and method for producing amorphous hard carbon film | — | 2004-11-23 |