Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4485682 | Transducer for torque and/or angular displacement measurement, especially in power screwdrivers | Reinhold Stroezel, Wilhelm Schwarze, Karl Roll, Wolfgang Raidt | 1984-12-04 |
| 4366871 | Motor-driven screwdriver | Herbert Dieterle, Karl Roll | 1983-01-04 |