Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882637 | Copying apparatus for copying a magnetic pattern from a master magnetic tape on a duplicate magnetic tape and method of operating such a copying apparatus | Johannes J. Roering | 1989-11-21 |
| 4864439 | Apparatus drawer for unambiguously receiving a digital audio tape cassette | — | 1989-09-05 |