Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4843488 | Noise elimination circuit for reproduction of audio signals in a magnetic tape recording and reproducing apparatus | Shigeyuki Ito | 1989-06-27 |
| 4825305 | Apparatus for recording and reproducing digital using dynamic range compression | Shigeyuki Itoh, Akitoshi Tsunoka | 1989-04-25 |
| 4809096 | Tracking controlling device using multiple pilot signals in magnetic video signal recording and reproducing apparatus | Nobuo Azuma, Hikaru Masui | 1989-02-28 |