Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7185717 | Drill bit assembly | Timothy Conn | 2007-03-06 |
| 6394197 | Reverse circulation drilling system with bit locked underreamer arms | — | 2002-05-28 |
| 6209665 | Reverse circulation drilling system with bit locked underreamer arms | — | 2001-04-03 |
| 5975222 | Reverse circulation drilling system with bit locked underreamer arms | — | 1999-11-02 |
| 5957226 | Reverse circulation drilling system with hexagonal pipe coupling | — | 1999-09-28 |
| 5803192 | Drill bit retainer for a down hole hammer assembly | — | 1998-09-08 |
| 5787999 | Drill bit with set of underreamer arms | — | 1998-08-04 |
| 5511628 | Pneumatic drill with central evacuation outlet | — | 1996-04-30 |