Issued Patents 2021
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11047479 | Method for producing piston ring with recess | Kazuhiro Fujimura, Atsushi Chiba, Iwao Hiraishi | 2021-06-29 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11047479 | Method for producing piston ring with recess | Kazuhiro Fujimura, Atsushi Chiba, Iwao Hiraishi | 2021-06-29 |