Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5283914 | Protective helmets | — | 1994-02-08 |
| 4643483 | Fluid supply system to rotary cutter heads on mining machines | Derek J. Brooks | 1987-02-17 |
| 4484937 | Dust filter apparatus | Gerald K. Burnard | 1984-11-27 |
| 4253854 | Dust filter apparatus | — | 1981-03-03 |