Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5992941 | Conveyor for ultra thin seam coal mining | — | 1999-11-30 |
| 5871260 | Mining ultra thin coal seams | — | 1999-02-16 |
| 5582466 | Advance/retreat cutting miner with simple conveyor | — | 1996-12-10 |
| 5087101 | Power spiral conveyor section and method | James C. Justice | 1992-02-11 |
| 4889392 | Advance/retreat cutting miner and method | James C. Justice | 1989-12-26 |
| 4556257 | Horizontal edna miner | James C. Justice | 1985-12-03 |
| 4239289 | Maneuverable full face miner | James C. Justice | 1980-12-16 |