Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4868435 | Single phase synchronous motor vibration apparatus | Gerhard Diefenbach, Hugo Schemmann | 1989-09-19 |
| 4827204 | Synchronous motor with dynamic damping | Hugo Schemmann | 1989-05-02 |
| 4807365 | Method for making the shaving head of a dry-shaving apparatus | Leo Bertram, Hugo Schemmann, Reinhard Huszar | 1989-02-28 |
| 4803390 | Dual motor drive arrangement for a small domestic appliance | Leo Bertram, Hugo Schemmann | 1989-02-07 |