Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4202417 | Raise drill with elastomeric load absorbing means | — | 1980-05-13 |
| 4195701 | Raise drill having water passages directed toward the roller cutters | Jackson M. Kellner | 1980-04-01 |