Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5651553 | Antirotation structure for combined oil ring | Masao Ishida | 1997-07-29 |
| 5618590 | Process for manufacturing a piston ring | Satomichi Miyazaki | 1997-04-08 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5651553 | Antirotation structure for combined oil ring | Masao Ishida | 1997-07-29 |
| 5618590 | Process for manufacturing a piston ring | Satomichi Miyazaki | 1997-04-08 |