Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4345839 | Device for controlling the position of a drift advancing machine | Bernhard Droescher | 1982-08-24 |
| 4344354 | Valve arrangement for controlling the stroke of a telescoping prop | Heinrich Suessenbeck, Gottfried Siebenhofer, Rienhard Neuper | 1982-08-17 |