Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4850547 | Magnetic tape cassette | — | 1989-07-25 |
| 4849843 | Demagnetizer for a magnetic head of a cassette tape recorder | Motoyoshi Fujita, Akikazu Kunuki, Tsutomu Kotani, Shunpei Saeki, Toshiharu Kawano | 1989-07-18 |