Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4994001 | Valve actuator differential worm planetary gear drive | Ivan E. Wilkinson, Charles L. Hylton | 1991-02-19 |
| 4896562 | Valve actuator differential worm planetary gear drive | Ivan E. Wilkinson, Charles L. Hylton | 1990-01-30 |