Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6357371 | Method and device for producing seams | Burkhard Wulfhorst | 2002-03-19 |
| 4369492 | Device for the protection of a converter which converts an impressed D-C current from a current source into an A-C current fed to a load | Helmut Schulze | 1983-01-18 |
| 4263542 | Method and circuit arrangement for controlling an asynchronous motor supplied from a static frequency changer | Helmut Schulze | 1981-04-21 |