Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5052436 | Device for feeding a fluid to a rotating machine part | Wolfgang Effenberger | 1991-10-01 |
| 5052866 | Actuating arrangement for a clamping device in a machine tool spindle | Franz Ziegeltrum, Helmut Heel | 1991-10-01 |
| 5022686 | Rotating union for two different fluids | Helmut Heel, Bartholomäus Reisacher, Jr., Stefan Worner | 1991-06-11 |
| 5018916 | Actuating arrangement for a tool or workpiece clamping device in a machine tool spindle | Alfred Raff, Helmut Heel, Norbert Leege | 1991-05-28 |