Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4612260 | Piston ring member | Atsushi Kumagai, Tsutomu Tanabe | 1986-09-16 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4612260 | Piston ring member | Atsushi Kumagai, Tsutomu Tanabe | 1986-09-16 |