Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6227587 | Combined well casing spider and elevator | — | 2001-05-08 |
| 5421241 | Gas lift bellows construction and process for manufacture thereof | — | 1995-06-06 |
| 5205357 | Latching device | — | 1993-04-27 |
| 5042584 | Stacked water regulator and method of use | — | 1991-08-27 |
| 4940089 | Latching device | — | 1990-07-10 |
| 4813730 | Retrieval device for a well control tool | — | 1989-03-21 |
| 4620349 | Apparatus for establishing pipe joint seals | — | 1986-11-04 |
| 4480687 | Side pocket mandrel system for dual chemical injection | — | 1984-11-06 |
| 4441519 | Gas lift valve and method of presetting | — | 1984-04-10 |
| 4360064 | Circulating valve for wells | John A. O'Connor, Warren E. Holland, James D. Burley, Ronald D. Rogers, Fred E. Watkins | 1982-11-23 |
| 4239082 | Multiple flow valves and sidepocket mandrel | — | 1980-12-16 |
| 4197909 | Protector for a deflector guide of a mandrel | — | 1980-04-15 |