Issued Patents 1989
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4868435 | Single phase synchronous motor vibration apparatus | Gerhard Diefenbach, Romuald L. Bukoschek | 1989-09-19 |
| 4827171 | Single-phase synchronous motor comprising a two-pole permanent-magnetic rotor and an eddy-current intermediate rotor | Leo Bertram | 1989-05-02 |
| 4827204 | Synchronous motor with dynamic damping | Romuald L. Bukoschek | 1989-05-02 |
| 4812691 | Device for improving the stability of rotation of the rotor of a single-phase synchronous motor | Leo Bertram, Gerhard Diefenbach | 1989-03-14 |
| 4807365 | Method for making the shaving head of a dry-shaving apparatus | Leo Bertram, Romuald L. Bukoschek, Reinhard Huszar | 1989-02-28 |
| 4803390 | Dual motor drive arrangement for a small domestic appliance | Leo Bertram, Romuald L. Bukoschek | 1989-02-07 |