Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4651582 | Counterbalanced pumps | — | 1987-03-24 |
| 4391155 | Reciprocating drive and reversing mechanism for long stroke, well pumping unit | — | 1983-07-05 |
| 4388837 | Positive engagement fail safe mechanism and lift belt construction for long stroke, well pumping unit | — | 1983-06-21 |
| 4242057 | Tandem long stroke reciprocating mud pump assembly | — | 1980-12-30 |