Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4290653 | Coal mining machine cutter with noise suppressant and flame resistant layer | — | 1981-09-22 |
| 4256343 | Mechanism for advancing continuous mining machine through mining cycle and tramming modes | Sigmund Black, Jerry C. Whitt, Roger Dale Plumley | 1981-03-17 |
| 4226476 | Continuous miner with improved roof-to-floor anchoring canopy units for advancing and turning machine and installing roof bolts | Jack R. Fairchild, James W. Gordon | 1980-10-07 |