Issued Patents All Time
Showing 26–37 of 37 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4924953 | Rock drill | — | 1990-05-15 |
| 4903787 | Rock drill | Wolfgang Peetz | 1990-02-27 |
| 4889200 | Rock drill | — | 1989-12-26 |
| 4883135 | Apparatus for rock drill | Wolfang Peetz, Hermann Hugger | 1989-11-28 |
| 4852670 | Drilling tool with an exchangeable feed helix | Wolfgang Peetz | 1989-08-01 |
| 4750572 | Drilling tool with an interchangeable conveying spiral | — | 1988-06-14 |
| 4729441 | Rock drill | Wolfgang Peetz | 1988-03-08 |
| 4699226 | Interchangeable conveying spiral for rock drills | Norbert Muller | 1987-10-13 |
| 4594033 | Boring tool for producing undercuts in holes | Wolfgang Peetz, Siegfried Klaissle, Norbert Muller | 1986-06-10 |
| 4579180 | Drilling bit | Wolfgang Peetz, Siegried Klaissle, August Hausmann | 1986-04-01 |
| 4202420 | Rock drill with hard metal drilling head | Wolfgang Peetz, Siegfried Klaissle | 1980-05-13 |
| 4202557 | Drilling device | August Haussmann, Siegfried Klaissle, Hermann Hugger, Walter Muller, Wolfgang Peetz +2 more | 1980-05-13 |