Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D308567 | Piston hand pump for fuel, oil and chemicals | Frank J. Russold | 1990-06-12 |
| D308385 | Pump assembly for high-viscosity liquid products | Frank J. Russold | 1990-06-05 |
| D308209 | Gear-pump assembly for liquid products | Robert E. Hall | 1990-05-29 |
| 4859155 | Bypass valve for a displacement pump | — | 1989-08-22 |