Issued Patents All Time
Showing 76–78 of 78 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5267621 | Drill pipe breakout device | Arthur D. Deken | 1993-12-07 |
| 5242026 | Method of and apparatus for drilling a horizontal controlled borehole in the earth | Arthur D. Deken | 1993-09-07 |
| 5220964 | Downhole compaction and stabilization back reamer and drill bit | Arthur D. Deken | 1993-06-22 |