Issued Patents All Time
Showing 26–30 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4415823 | Generator for the production of electrical energy | — | 1983-11-15 |
| 4373593 | Drill bit | Cornelius Phaal | 1983-02-15 |
| 4252102 | Cutting element for processing rocks, metal or the like | Cornelius Phaal | 1981-02-24 |
| 4200159 | Cutter head, drill bit and similar drilling tools | Eberhard Peschel, Hermann Rathkamp, Klaus Katzorke | 1980-04-29 |
| 4187061 | Rotary helical fluid motor with deformable sleeve for deep drilling tool | — | 1980-02-05 |