Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5207196 | Pre-assembled unit for engine valve system | Ronald Rich | 1993-05-04 |
| 4538558 | Valve rotating device | Stanley H. Updike, William A. Michaels | 1985-09-03 |
| 4425882 | Valve rotating device | Stanley H. Updike, William A. Michaels | 1984-01-17 |