Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6183910 | Electrochemical lithium secondary element | Hans-Walter Praas, Sibylle Kemmler-Sack | 2001-02-06 |
| 4574408 | Lifting device for use in a bath tub | Wolfgang Dentler | 1986-03-11 |