Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8641070 | Drive assistance device, wheelchair and method for determination of the physical efficiency and muscular effort data of a wheelchair driver | Thomas Birmanns, Bernd Engels, Paul-Gerhard Bitzer | 2014-02-04 |
| 7100716 | Modular wheel chair | Bernd Engels, Marc Binder, Thomas Birmanns | 2006-09-05 |