Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5001965 | Piston and piston ring | Brian L. Ruddy | 1991-03-26 |
| 4669369 | Piston and piston ring assemblies | David A. Parker, Brian L. Ruddy | 1987-06-02 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5001965 | Piston and piston ring | Brian L. Ruddy | 1991-03-26 |
| 4669369 | Piston and piston ring assemblies | David A. Parker, Brian L. Ruddy | 1987-06-02 |