Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4765210 | Hydraulically powered screwing means | Gustav Frohn, Olaf Blockisch | 1988-08-23 |
| 4709600 | Power screw driver with a ratchet wheel having finely graduated toothing | Gustav Frohn, Olaf Blockisch | 1987-12-01 |