Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4304410 | Sealing structure for reciprocating pistons exposed to high pressure differentials | John W. Erickson, Harold L. Petrie, Herbert L. Johnson, III | 1981-12-08 |
| 4273509 | Self-powered cleaning unit for a fluid pump | John W. Erickson, Thomas A. White | 1981-06-16 |
| 4259041 | High flow standing valve | — | 1981-03-31 |