Issued Patents 1982
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4355653 | Vented check valve | — | 1982-10-26 |
| 4354806 | Pneumatically powerable double acting positive displacement fluid pump | John R. McMillin, Gene A. Tracy, William A. Harvill | 1982-10-19 |
| 4334838 | Diaphragm type fluid pump having a flexible diaphragm with an internal reinforcing plate | Herman S. Fessler, William A. Harvill | 1982-06-15 |