Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5692306 | Hand-held working tool | Heinz Hettmann | 1997-12-02 |
| 5682461 | Method of transmitting or storing digitalized, multi-channel audio signals | Andreas Silzle, Guenther Theile, Martin Link | 1997-10-28 |