Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5000622 | Shaking control unit for a hydraulic cylinder | — | 1991-03-19 |
| 4907918 | Shaking control unit for a hydraulic cylinder | — | 1990-03-13 |
| 4798417 | Method of separating the upper coal in seams | Gunter Blumenthal, Gustav Neu, Karl-Heinz Berger | 1989-01-17 |
| 4529006 | Electrohydraulic three-port, two position valve | Gunter Blumenthal | 1985-07-16 |
| 4379662 | Control device for an advancing support in underground mining | — | 1983-04-12 |
| 4361075 | Unlockable check valve, particularly for use as recovery and setting valve in underground mining | — | 1982-11-30 |
| 4274435 | Excess pressure valve particularly for a fluid pressure operated telescopic supporting element employed in underground mining | — | 1981-06-23 |