Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5513715 | Flat seal for a roller cone rock bit | — | 1996-05-07 |
| 5441120 | Roller cone rock bit having a sealing system with double elastomer seals | — | 1995-08-15 |
| 5027911 | Double seal with lubricant gap between seals for sealed rotary drill bits | — | 1991-07-02 |
| 4981182 | Sealed rotary blast hole drill bit utilizing air pressure for seal protection | — | 1991-01-01 |
| 4813502 | Drilling bit with improved trailing edge vent | — | 1989-03-21 |
| 4688651 | Cone mouth debris exclusion shield | — | 1987-08-25 |
| 4249622 | Floating seal for drill bits | — | 1981-02-10 |