Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4757490 | Modulation abnormality detector for optical sound-recording system | Yoshio Ozaki | 1988-07-12 |
| 4734903 | Level control circuit for light beam recording apparatus | Yoshio Ozaki | 1988-03-29 |
| 4442461 | Signal recording and/or reproducing technique | Kenji Nakano, Hisayoshi Moriwaki | 1984-04-10 |