Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5449238 | Method for operating a recording device powered by at least one rechargeable accumulator | Ngoc Quyen Pham, Walter Eiler, Friedrich-Wilhelm Drees, Wolfgang Pekruhn | 1995-09-12 |