Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6242822 | Electric machine | Rolf Strothmann | 2001-06-05 |
| 5908197 | Braking assembly for an in-line roller skate | Achim Strothmann | 1999-06-01 |
| 4603484 | Level sensing apparatus providing output signals compatible with digital apparatus | — | 1986-08-05 |