Patents per Year
Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9290994 | Sonde housing and bit body arrangement for horizontal directional drilling | — | 2016-03-22 |
| 8397364 | Locking pin for coupling components | — | 2013-03-19 |
| 7954225 | Locking pin for coupling components | — | 2011-06-07 |
| 7810582 | Counterbalance enabled power generator for horizontal directional drilling systems | — | 2010-10-12 |
| 6702046 | Drill device for a drilling apparatus | Roy L. Chandler | 2004-03-09 |
| 6401842 | Directional drilling apparatus with shifting cam | Roy L. Chandler | 2002-06-11 |
| 6082470 | Directional drilling system and apparatus | Roy L. Chandler | 2000-07-04 |
| 5957222 | Directional drilling system | Roy L. Chandler | 1999-09-28 |