Issued Patents All Time
Showing 26–31 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4811798 | Drilling motor deviation tool | William N. Schoeffler | 1989-03-14 |
| 4807709 | Fluid Powered drilling jar | William N. Schoeffler | 1989-02-28 |
| 4770258 | Well deviation control tool | — | 1988-09-13 |
| 4715253 | Line wrap power tongs | William N. Schoeffler | 1987-12-29 |
| 4715453 | Drilling deviation control tool | William N. Schoeffler | 1987-12-29 |
| 4618010 | Hole opener | John W. Hester | 1986-10-21 |