Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D724406 | Combination socket-wrench handle and hammer | Andreas Dierolf, Alexander Daus, Markus Kuehner | 2015-03-17 |
| 6640911 | Device for connecting a tool to a drive | Karl Lieser, Andreas Dierolf | 2003-11-04 |