Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4762302 | Valve sleeve and method of manufacturing same | Masao Sugita, Takachi Marumo | 1988-08-09 |
| 4706487 | Method of manufacturing a valve sleeve | Masao Sugita, Takachi Marumo | 1987-11-17 |