Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6675898 | Apparatus for preventing critical annular pressure buildup | — | 2004-01-13 |
| 6457528 | Method for preventing critical annular pressure buildup | — | 2002-10-01 |
| 6442826 | Method for manufacturing a flush/semi-flush threaded connection | Doyle E. Reeves | 2002-09-03 |
| 6363598 | Method of assembling pipe joints | H. Dean Goodson, Charles L. Ashby | 2002-04-02 |
| 5260780 | Visual inspection device and process | — | 1993-11-09 |
| 4334444 | Power tongs | Kenneth J. Carstensen | 1982-06-15 |
| 4215602 | Power tongs | Kenneth J. Carstensen | 1980-08-05 |