Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4966417 | Device for guying a drift advancing machine within a drift | Alfred Zitz, Erich Brandl | 1990-10-30 |
| 4878714 | Cutting machine for cutting and carrying away material from a work face | Krzysztof J. Rutkowski | 1989-11-07 |
| 4711502 | Apparatus for cutting excavations having a substantially planar face | Ferdinand Bedenk, Otto Schetina, Alfred Zitz | 1987-12-08 |
| 4688855 | Drift advancing or exploiting machine | Eduard Krivec, Alfred Zitz | 1987-08-25 |
| 4664449 | Drift advancing or mining machine | Ferdinand Bedenk, Otto Schetina, Alfred Zitz | 1987-05-12 |
| 4662685 | Device for sealing a drift cross section driven by means of a cutting machine | Ferdinand Bedenk, Otto Schetina, Alfred Zitz | 1987-05-05 |