Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6401520 | Dust detector tube | Jon C. Volkwein, Harry DoBroski, Jr. | 2002-06-11 |
| 5407253 | Water spray ventilator system for continuous mining machines | Thomas Mal | 1995-04-18 |
| 4849893 | Computer control system | Derek P. M. Wills, Barry M. Lowe, John G. Brown, Neil J. Curtis, Adrian J. Hall +1 more | 1989-07-18 |