Issued Patents 1989
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4864423 | Information recording disc and information signal recording apparatus therefor | Tadao Nagai, Akira Mashimo | 1989-09-05 |
| 4849954 | Disc attitude variation detecting apparatus | — | 1989-07-18 |
| 4841504 | Method and apparatus for recording an information signal on a rotary recording medium | Akira Mashimo | 1989-06-20 |
| 4827339 | Moving picture signal transmission system | Masahiro Wada, Hideo Yamamoto | 1989-05-02 |
| 4805164 | Disc inclination detecting apparatus | Kenichi Sato | 1989-02-14 |
| 4803677 | Rotary recording medium having a guide track and recording and reproducing apparatus therefor | Horoshi Usami, Tadao Nagai, Akira Mashimo | 1989-02-07 |
| 4802159 | Information recording disc and information signal recording apparatus therefor | Tadao Nagai, Akira Mashimo | 1989-01-31 |