Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7040601 | Valve guide for internal combustion engine made from iron base sintered alloy | Koichiro Hayashi, Katsuaki Sato | 2006-05-09 |
| 6616726 | Material for valve guides | Koichiro Hayashi | 2003-09-09 |
| 6012703 | Valve guide and process for manufacturing thereof | Koichiro Hayashi | 2000-01-11 |
| 5259860 | Sintered metal parts and their production method | Yutaka Ikenoue, Ryoji Satoh, Koichiro Hayashi | 1993-11-09 |