Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5439063 | Compressed-air screw or bolt tightener, especially an impulse or a torque screw or bolt tightener | Konrad Karl Kettner | 1995-08-08 |
| 5217079 | Hydro-impulse screwing device | Konrad Karl Kettner, Eugen Mattheiss | 1993-06-08 |
| 5172772 | Hydro-impulse screw tool | Konrad Karl Kettner | 1992-12-22 |
| 5060772 | Power-operated tool | Eugen Mattheiss, Dieter Weimer | 1991-10-29 |
| 4648282 | Power screwdriver | Wolfgang Josef Alender, Hermann J. Leuthner | 1987-03-10 |