Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5152194 | Hardfaced mill tooth rotary cone rock bit | Madapusi K. Keshavan, Scott D. McDonough | 1992-10-06 |
| 4781697 | Removable protective shield for needle sheath | — | 1988-11-01 |
| 4582149 | Drill bit having replaceable nozzles directing drilling fluid at a predetermined angle | — | 1986-04-15 |