Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5417526 | Hollow crown drill with end face cutting members | Maximilian Stock, William Ott | 1995-05-23 |
| 5069584 | Hollow drilling tool | Josef Obermeier, Eugen Magyari, Walter Ritt, Horst-Detlef Gassmann, Peter Cavada | 1991-12-03 |
| 4448261 | Motorized hand tool for drilling | Heinz Kousek | 1984-05-15 |
| 4287656 | Method of setting fastening elements in a hard receiving material | Horst-Detlef Gassman | 1981-09-08 |