Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4986168 | Piston and multilayer piston ring set | Robert Geffroy, Lloyd M. Forster | 1991-01-22 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4986168 | Piston and multilayer piston ring set | Robert Geffroy, Lloyd M. Forster | 1991-01-22 |