Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5295735 | Rock saw | David C. Cobbs | 1994-03-22 |
| 5206840 | Geophone implantation system | David C. Cobbs | 1993-04-27 |
| 4907664 | Rock cutting tool | David C. Cobbs | 1990-03-13 |
| 4191492 | Method of installing a liner in a large diameter borehole | — | 1980-03-04 |