Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4819104 | Disk pack drive with electric motor having sintered permanent magnets | Albert Dierkes, Joachim Gilly, Friedrich Schellenberger | 1989-04-04 |
| 4806808 | Printed circuit board for external rotor motor with recess for Hall transducers | Helmut Schmidt | 1989-02-21 |