Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4865265 | Magnetic tape cassette | Kenji Hashizume, Masatoshi Okamura | 1989-09-12 |
| 4862448 | Disc cartridge and casing therefor | Kimio Tanaka, Morimasa Sasaki | 1989-08-29 |
| 4847717 | Handling of a tape cassette | Takateru Satoh, Haruo Shiba | 1989-07-11 |