Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4853284 | Mechanical part | Hajime Kohama, Hisao Yabe | 1989-08-01 |
| 4822662 | Machine parts with wear-resistant surface brought into contact with elongated fibrous member | Hajime Kohama, Hisao Yabe, Akira Yano, Shinsuke Noto | 1989-04-18 |