Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4321967 | Suction of gases from boreholes in coal mining | Uwe Koppe, Walter Stegmanns | 1982-03-30 |
| 4181115 | Power control of a stone cutting machine having cutting chains | — | 1980-01-01 |