Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5716013 | Polygon-shaped rotatable apparatus and its use in composting and cement industries | Jack Benson | 1998-02-10 |
| 4391339 | Cavitating liquid jet assisted drill bit and method for deep-hole drilling | Virgil Johnson, Jr., Andrew F. Conn | 1983-07-05 |
| 4262757 | Cavitating liquid jet assisted drill bit and method for deep-hole drilling | Virgil Johnson, Jr., Andrew F. Conn | 1981-04-21 |