Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6213474 | Piston ring and combination of compression rings | Koji Takeuchi | 2001-04-10 |
| 5433001 | Method of producing piston ring | Takeshi Tsuchiya, Yoshio Onodera, Satoshi Kawashima | 1995-07-18 |
| 5405154 | Piston ring | Takeshi Tsuchiya, Yoshio Onodera, Satoshi Kawashima | 1995-04-11 |
| 5292381 | Piston ring and process for manufacturing the same | Takeshi Tsuchiya, Yoshio Onodera, Satoshi Kawashima | 1994-03-08 |