Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4649011 | Method of making a cam shaft | Genkichi Umeha, Shigeru Urano, Osamu Hirakawa | 1987-03-10 |
| 4644912 | Cam shaft and method of manufacture | Genkichi Umeha, Shigeru Urano, Osamu Hirakawa | 1987-02-24 |