Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6469619 | Intrinsically-safe roof hazard alert module | Albert L. Brautigam | 2002-10-22 |
| 5161857 | Teleoperated control system for underground room and pillar mining | August J. Kwitowski, Albert L. Brautigam, Brian Mueller | 1992-11-10 |
| 5033795 | Method of mining a mineral deposit seam | Richard Farrar, George R. Bockosh | 1991-07-23 |