Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4541587 | Hub for magnetic tape cassettes, especially compact cassettes, and magnetic tape cassette possessing one or more such hubs | Gunter Bettinger, Friedrich Engel, Horst Fitterer, Norbert Kreimes, Dietmar Pfefferkorn +2 more | 1985-09-17 |
| 4515331 | Hub for magnetic tape cassettes, especially compact cassettes, and magnetic tape cassette possessing one or more such hubs | Gunter Bettinger, Friedrich Engel, Horst Fitterer, Norbert Kreimes, Dietmar Pfefferkorn +2 more | 1985-05-07 |