Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4800554 | Disk magazine | Hidetoshi Yamasaki | 1989-01-24 |
| 4797865 | Information recording disc player having receiving parts for receiving a plurality of disc cartridges | Tooru Imai, Kouichi Mutou, Hidetoshi Yamazaki | 1989-01-10 |