Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5316321 | Nonferrous piston ring with hard surface treatment layer | Masao Ishida | 1994-05-31 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5316321 | Nonferrous piston ring with hard surface treatment layer | Masao Ishida | 1994-05-31 |