Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883322 | Mining and conveying apparatus | Heinz Kunzer, Kurt Plaga | 1989-11-28 |
| 4798417 | Method of separating the upper coal in seams | Gustav Neu, Karl-Heinz Berger, Siegmar Block | 1989-01-17 |
| 4657443 | Arrangement for supervising synchronous displacement of the pistons of two cylinder-and-piston units | — | 1987-04-14 |
| 4529006 | Electrohydraulic three-port, two position valve | Siegmar Block | 1985-07-16 |
| 4280734 | Arrangement for controlled engagement of the tools of a mining machine with a mine face | Alfred Bollmann | 1981-07-28 |