Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6361217 | High capacity thrust bearing | — | 2002-03-26 |
| 5884716 | Constant bottom contact thruster | — | 1999-03-23 |
| 5669457 | Drill string orienting tool | Danny S. Sebastian | 1997-09-23 |
| 5165492 | Apparatus for preventing separation of a down-hole motor from a drill string | — | 1992-11-24 |
| 5086851 | Combination thrust and radial bearing for use in down-hole drilling tools | — | 1992-02-11 |
| 4873675 | Method and apparatus for seismic exploration of strata surrounding a borehole | Frederick J. Barr, Richard H. Piggin | 1989-10-10 |
| 4630690 | Spiralling tapered slip-on drill string stabilizer | Chuan C. Teng | 1986-12-23 |
| 4600063 | Double-taper slip-on drill string stabilizer | — | 1986-07-15 |