Issued Patents All Time
Showing 26–39 of 39 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5775445 | Drilling unit with hollow annular drill bit and central drill | — | 1998-07-07 |
| 5735648 | Tool bit with carrier member and cutting member | — | 1998-04-07 |
| 5704744 | Arrangement for transmitting torque in a manually operated tool | Josef Obermeier | 1998-01-06 |
| 5628376 | Drilling tool bit with a carrier member and cutter members | — | 1997-05-13 |
| 5569002 | Hollow annular drill bit with hollow cylindrical carrier member | — | 1996-10-29 |
| 5397203 | Tool and tool holder for hand-tool apparatus | Wolfgang Lange, Reinhard Schulz, Holger Meinke | 1995-03-14 |
| 5375950 | Tool and tool holder for manually operated tools | Reinhard Schulz | 1994-12-27 |
| 5326199 | Tool bit and tool bit chuck for manually operated tools | Reinhard Schulz | 1994-07-05 |
| 5320459 | Tool bit for percussion drilling and chipping and chuck for the tool bit | — | 1994-06-14 |
| 4840519 | Drill bit for hand drills | — | 1989-06-20 |
| 4702651 | Tool holder for drilling machines, drilling device as well as drills and set of drills | — | 1987-10-27 |
| 4531596 | Tool for boring an enlarged portion within the interior of a hole and a tiltable tool for completing that tool | — | 1985-07-30 |
| 4275796 | Rock drilling tool | — | 1981-06-30 |
| 4243113 | Drilling head of a rotary impact drill | — | 1981-01-06 |