Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6749790 | Handle for a hand tool and method for the manufacture thereof | Andreas Dierolf | 2004-06-15 |
| 6640911 | Device for connecting a tool to a drive | Andreas Dierolf, Frank Kollmar | 2003-11-04 |
| 6629338 | Handle for a tool | Andreas Dierolf | 2003-10-07 |
| RE34680 | Screw tool | — | 1994-08-02 |
| 4884478 | Screw tool | — | 1989-12-05 |
| 4883392 | Fly-cutter milling machine | — | 1989-11-28 |
| 4863321 | Fly-cutter milling machine | — | 1989-09-05 |
| 4739536 | Screwdriver handgrip having harder and softer zones | Jan-Eric Bandera, Peter Kern, Roland Schindhelm, Johannes Solf | 1988-04-26 |
| 4726720 | Method of milling teeth surfaces from the free end of a workpiece | — | 1988-02-23 |
| 4629375 | Chuck for tool shanks, particularly screwdriver bits | — | 1986-12-16 |
| 4442071 | Extraction of plutonium ions from aqueous sulfuric acid solutions with D.sub.2 EHPA or D.sub.2 EHPA/TOPO | Bernd Stojanik | 1984-04-10 |
| 4404874 | Screwdriver with replaceable blade | — | 1983-09-20 |