Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4629374 | Boring tool with cutting edge adjustment for withdrawal clearance | — | 1986-12-16 |
| 4626144 | Boring tool with balancing means for non-vibrating boring | — | 1986-12-02 |
| 4595320 | Boring tool with a double cutter head, in which the working load is prevented outside the elastic range of the cutting bit holder material in the vicinity of the outermost radial positioning | Hans Berger, Kurt Boller | 1986-06-17 |