Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4565410 | Apparatus for controlling the supply of high-pressure liquid to a cutter drum assembly | — | 1986-01-21 |
| 4541607 | High-pressure ball valve | — | 1985-09-17 |
| 4471998 | Cutter drum assembly for longwall mining machines | — | 1984-09-18 |
| 4462619 | Mechanical sealing means for rotary fluid coupling | — | 1984-07-31 |
| 4449738 | Rotary fluid coupling | — | 1984-05-22 |
| 4302019 | Labyrinthine mechanical seal | — | 1981-11-24 |