Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4412700 | System for monitoring the movement of a cutting tool of a tunnel-driving machine relative to a desired profile | Alfred Zitz, Otto Schetina | 1983-11-01 |
| 4368918 | Process and apparatus for controlling the water supply to the cutting head of a cutting machine | Herwig Wrulich, Alfred Zitz, Otto Schetina | 1983-01-18 |
| 4351564 | Device for preventing collision between part of the cutting arm and part of the loading ramp for a cutting machine | Hans P. Pfundner, Herwig Wrulich | 1982-09-28 |