Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4844377 | Tape cassette | Toshibumi Kamiyama, Akihiro Nishimura, Masao Kawagishi, Hideki Sakumoto, Masahiko Matsui | 1989-07-04 |
| 4809113 | Tape cassette with improved cover structure | Akihiro Nishimura, Masao Kawagishi, Hideki Sakumoto, Masahiko Matsui | 1989-02-28 |
| 4803575 | Tape cassettes having bottom grooves for use in tape recorder having bottom projection in cassette holder | Akihiro Nishimura, Masao Kawagishi, Hideki Sakumoto, Masahiko Matsui | 1989-02-07 |