Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6660056 | Valve seat for internal combustion engines | Koichiro Hayashi, Toru Tsuboi | 2003-12-09 |
| 6562098 | Wear resistant sintered member | Hiroki Fujitsuka, Koichiro Hayashi, Tomonori Miyazawa, Koji Koyanagi, Akira Fujiki +4 more | 2003-05-13 |