Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6386301 | Down-hole hammer | — | 2002-05-14 |
| 6035953 | Down hole hammer assembly | — | 2000-03-14 |
| 5722495 | Make up system of a down-the-hole hammer | — | 1998-03-03 |
| 5238073 | Uphole hammer | — | 1993-08-24 |
| 5056609 | Valve assembly for a downhole to remove bore hole subsidence | — | 1991-10-15 |
| 4932483 | Down hole hammer | — | 1990-06-12 |
| 4921052 | Downhole recirculating hammer | — | 1990-05-01 |
| 4534422 | Fluid operated hammer | — | 1985-08-13 |
| 4530407 | Fluid operated hammer | — | 1985-07-23 |