Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5004007 | Chemical injection valve | John R. Gordon | 1991-04-02 |
| 4858694 | Heave compensated stabbing and landing tool | Joseph A. Burkhardt, Thomas W. Childers | 1989-08-22 |
| H635 | Injection mandrel | John R. Gordon | 1989-06-06 |
| 4651818 | Metal seal tubing plug | Thomas W. Childers | 1987-03-24 |
| 4615387 | Annular gas trap | John M. Bednar | 1986-10-07 |
| 4321751 | Depth measurements | Thomas W. Childers | 1982-03-30 |