Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4632403 | Stern tube seal device providing a seal about a rotatable shaft | Takashi Unseki, Saburo Amiboshi, Eiichi Kawamura | 1986-12-30 |
| 4534569 | Stern tube seal device providing a seal about a rotatable shaft | Takashi Unseki, Saburo Amiboshi, Eiichi Kawamura | 1985-08-13 |
| 4482158 | Stern tube seal device | Toshiharu Hamasaki, Shoji Shiomi, Eiichi Kawamura | 1984-11-13 |
| 4482159 | Stern tube seal device | Eiichi Kawamura | 1984-11-13 |