Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6469619 | Intrinsically-safe roof hazard alert module | William D. Mayercheck | 2002-10-22 |
| 5161857 | Teleoperated control system for underground room and pillar mining | William D. Mayercheck, August J. Kwitowski, Brian Mueller | 1992-11-10 |