Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5267803 | Cassette having compatibility arrangement | — | 1993-12-07 |
| 4971462 | Plural cassettes having compatibility arrangement | Hans W. Mueller | 1990-11-20 |
| 4900171 | Ink ribbon and correction tape cassette compatibility | Hans W. Mueller | 1990-02-13 |
| 4886385 | Ribbon tensioning mechanism | — | 1989-12-12 |
| D289529 | Ribbon cassette | Anthony Bartolone | 1987-04-28 |
| D265566 | Ribbon cartridge | Cornelius W. Christie | 1982-07-27 |
| D265567 | Ribbon cartridge | Cornelius W. Christie | 1982-07-27 |
| 4337001 | Releasable ribbon locking device in a ribbon cartridge | — | 1982-06-29 |