Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4921306 | Mining machine and method utilizing intensifier for high and low water pressure to cutting drum | — | 1990-05-01 |
| 4314730 | Mineral mining machine with high pressure fluid nozzle and intensifier | Norman A. Plumpton | 1982-02-09 |