Issued Patents All Time
Showing 26–42 of 42 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5890403 | Braking mechanism for power tongs | — | 1999-04-06 |
| 5819604 | Interlocking jaw power tongs | — | 1998-10-13 |
| 5819605 | Low friction power tong jaw assembly | Daniel S. Bangert | 1998-10-13 |
| 5704427 | Portable well service rig | Daniel S. Bangert, Philip O'Connor | 1998-01-06 |
| 5702139 | Back-up power tongs | — | 1997-12-30 |
| 5671961 | Back-up power tongs | — | 1997-09-30 |
| 5435213 | Ring gear camming member | — | 1995-07-25 |
| 5291808 | Ring gear camming member | — | 1994-03-08 |
| 5222718 | Flanged washer spring | — | 1993-06-29 |
| 4986146 | Camming member for power tongs | — | 1991-01-22 |
| 4889198 | Drilling jar latch | — | 1989-12-26 |
| 4709599 | Compensating jaw assembly for power tongs | — | 1987-12-01 |
| 4700787 | Power tong torque control | Ronald N. James | 1987-10-20 |
| 4688649 | Mechanical drill string jar | — | 1987-08-25 |
| 4649777 | Back-up power tongs | — | 1987-03-17 |
| 4631987 | Power tongs | — | 1986-12-30 |
| 4576067 | Jaw assembly | — | 1986-03-18 |