Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10024107 | Rotary drill bit | Gregory W. Peterson, Srinidhi Bangalore Gopalakrishna | 2018-07-17 |
| 8763728 | Percussion assisted rotary earth bit and method of operating the same | Allan W. Rainey | 2014-07-01 |
| 8627903 | Percussion assisted rotary earth bit and method of operating the same | Allan W. Rainey | 2014-01-14 |
| 8353369 | Percussion assisted rotary earth bit and method of operating the same | Allan W. Rainey | 2013-01-15 |
| 5755298 | Hardfacing with coated diamond particles | Robert Delwiche | 1998-05-26 |
| 5755299 | Hardfacing with coated diamond particles | Robert Delwiche | 1998-05-26 |
| 5620290 | Ground retainer | Kent D. Homfeldt, Barth Leatherman | 1997-04-15 |
| 4934467 | Drill bit wear resistant surface for elastomeric seal | — | 1990-06-19 |
| 4875532 | Roller drill bit having radial-thrust pilot bushing incorporating anti-galling material | — | 1989-10-24 |
| 4722405 | Wear compensating rock bit insert | — | 1988-02-02 |
| 4397361 | Abradable cutter protection | — | 1983-08-09 |
| 4256351 | Sealing system for a rolling cone cutter earth boring bit | — | 1981-03-17 |