Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4617954 | Valve assemblies | John F. Marsh | 1986-10-21 |
| 4580594 | Valve devices | — | 1986-04-08 |
| 4360322 | Positive displacement pump systems | Ian T. Bristow | 1982-11-23 |
| 4340337 | Positive displacement pump systems | Ian T. Bristow | 1982-07-20 |
| 4298315 | Positive displacement pump systems | Ian T. Bristow | 1981-11-03 |