Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4653783 | Device for detachably securing a housing part | — | 1987-03-31 |
| 4639801 | Loading mechanism for a magnetic tape cassette apparatus | Rolf D. Hoppmanns, Willibald Wieczorek, Franz Beitler | 1987-01-27 |