Issued Patents 2003
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6508473 | Piston ring | Shoji Tanaka, Shinichi Imai | 2003-01-21 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6508473 | Piston ring | Shoji Tanaka, Shinichi Imai | 2003-01-21 |