Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6666521 | System for controlling cutting horizons for continuous type mining machines | John W. Ramsden, Jr. | 2003-12-23 |
| 4634186 | Control system for longwall shearer | — | 1987-01-06 |
| 4466667 | Longwall shearer tracking system | Peter D. Poulsen, Richard J. Stein | 1984-08-21 |