Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4538558 | Valve rotating device | William A. Michaels, Frederick L. Kuonen | 1985-09-03 |
| 4425882 | Valve rotating device | William A. Michaels, Frederick L. Kuonen | 1984-01-17 |
| 4227493 | Valve rotator | — | 1980-10-14 |