Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4844377 | Tape cassette | Yoshinori Shiomi, Toshibumi Kamiyama, Akihiro Nishimura, Masao Kawagishi, Hideki Sakumoto | 1989-07-04 |
| 4811121 | Magnetic recording and reproducing system using preceding and lagging groups of rotary heads to permit coincident timing for reproduced video and audio signals | Kunio Sekimoto | 1989-03-07 |
| 4809113 | Tape cassette with improved cover structure | Akihiro Nishimura, Masao Kawagishi, Hideki Sakumoto, Yoshinori Shiomi | 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, Yoshinori Shiomi | 1989-02-07 |