Issued Patents All Time
Showing 51–59 of 59 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4648457 | Injection control device for subterranean well conduit | Joseph N. Klumpyan | 1987-03-10 |
| 4605062 | Subsurface injection tool | Joseph N. Klumpyan | 1986-08-12 |
| 4605063 | Chemical injection tubing anchor-catcher | — | 1986-08-12 |
| 4576196 | Unloading injection control valve | David J. Speller | 1986-03-18 |
| 4552218 | Unloading injection control valve | David J. Speller | 1985-11-12 |
| 4535842 | Well tool setting assembly | — | 1985-08-20 |
| 4498536 | Method of washing, injecting swabbing or flow testing subterranean wells | David J. Speller | 1985-02-12 |
| 4393930 | Subterranean well pressure surging tool | Luis E. Mendez | 1983-07-19 |
| 4317485 | Pump catcher apparatus | — | 1982-03-02 |