Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4632403 | Stern tube seal device providing a seal about a rotatable shaft | Kenichiro Ishitani, Takashi Unseki, Eiichi Kawamura | 1986-12-30 |
| 4534569 | Stern tube seal device providing a seal about a rotatable shaft | Kenichiro Ishitani, Takashi Unseki, Eiichi Kawamura | 1985-08-13 |