Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6276907 | Hydraulically driven diaphragm pump | Robert D. Cooper, Shawn C. Johnson, Wayne M. Bekius | 2001-08-21 |
| 5911364 | Reversible tip detent | Shawn C. Johnson | 1999-06-15 |
| D377799 | Consumer piston paint pump | Andrew L. Von Duyke | 1997-02-04 |
| 5472318 | Rupture disk pressure relief assembly for a paint pump | Peter L. Frank, Robert D. Cooper | 1995-12-05 |
| 5316445 | Pumping apparatus with piston seal and cylinder removing means | Mark Snetting, Robert D. Cooper | 1994-05-31 |
| 4280276 | Reciprocating cutter | Robert C. Comer | 1981-07-28 |