Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4790791 | Ring-shaped coupling | Susumu Sumida, Atsuo Kamata | 1988-12-13 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4790791 | Ring-shaped coupling | Susumu Sumida, Atsuo Kamata | 1988-12-13 |