Issued Patents 2017
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9671019 | Piston ring with a periodically varying groove | FRANK NATHEM | 2017-06-06 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9671019 | Piston ring with a periodically varying groove | FRANK NATHEM | 2017-06-06 |