Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5329956 | Pneumatic operated valve stroke timing | Winslow K. Duff, Francis X. McDonald | 1994-07-19 |
| 5253185 | Valve diagnostic system including auxiliary transducer box | John H. Mutchler | 1993-10-12 |