Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4708752 | Process for laser hardening drilling bit cones having hard cutter inserts placed therein | — | 1987-11-24 |
| 4683781 | Cast steel rock bit cutter cones having metallurgically bonded cutter inserts, and process for making the same | William J. Salesky, Steven J. Guzowski | 1987-08-04 |
| 4632401 | Hermetically welded belleville seal for rock bits | Cary A. Roth | 1986-12-30 |
| 4560175 | Hermetically welded belleville seal for rocks bits | Cary A. Roth | 1985-12-24 |
| 4429854 | Dual squeeze seal gland | Rao R. Nimmagadda | 1984-02-07 |