Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4516467 | Method and apparatus for controlling a rotary percussive hydraulic drill | Keith Keeney | 1985-05-14 |
| 4460294 | Toggle type temporary roof support for mining machinery | William R. Cobb | 1984-07-17 |