Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6344940 | Method and apparatus for adding 1/f fluctuation to an audio signal | Yoichiro Sako | 2002-02-05 |
| 5832088 | Method and apparatus for preventing data copying from a disk using data lengths too large for a pirate medium | Takaharu Kitada, Hiroshi Ogawa | 1998-11-03 |
| 5111442 | Recordable optical disc storage device with limited storage capacity, and recording apparatus therefor | Masahiro Hotori, Hiroshi Ogawa, Kazuhiko Fujiie | 1992-05-05 |
| 4445150 | Recording in a single track visual signals associated with audio signals recorded in opposed directions in plural tracks | Kenkichi Umeda, Youichi Kodera, Noriaki Naito, Hiroyuki Yamauchi, Isao Matsumoto +4 more | 1984-04-24 |