Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8186764 | Noise reduced continuous miner | Joseph J. Zimmerman | 2012-05-29 |
| 5597393 | Displaceable filtering apparatus for airborne contaminates | Christopher George Stewart | 1997-01-28 |