Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5401218 | Outboard planetary gear assembly for tracked vehicles | Raymond W. Burns | 1995-03-28 |
| 5219056 | Clutch lock-out assembly | — | 1993-06-15 |
| 5085280 | Drill rig shut-off system | — | 1992-02-04 |
| 5062490 | Kelly bar coupling | — | 1991-11-05 |
| 4870738 | Vehicle mounted drill rod holding device | — | 1989-10-03 |
| 4854395 | Hydraulic kelly bar chuck | Raymond W. Burns | 1989-08-08 |
| 4638871 | Earth drill rig | — | 1987-01-27 |
| 4585256 | Side feed water swivel | Dean T. Pierce | 1986-04-29 |
| 4576498 | Assembly structure for a soil sampler | — | 1986-03-18 |
| 4482173 | Drill string joint | — | 1984-11-13 |
| 4456079 | Apparatus and method for taking soil samples | — | 1984-06-26 |
| 4405020 | Automatic drive hammer system | — | 1983-09-20 |
| 4393945 | Rotary drill with a kelly bar and hydraulic chuck | — | 1983-07-19 |
| 4345493 | Drill rod holding and break-out device | — | 1982-08-24 |
| 4192485 | Drill rig hoist | Richard R. Hesskamp | 1980-03-11 |