Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5939986 | Mobile machine hazardous working zone warning system | William H. Schiffbauer | 1999-08-17 |
| 5500649 | Method and apparatus for monitoring the thickness of a coal rib during rib formation | Gary L. Mowrey, William D. Monaghan | 1996-03-19 |