Issued Patents 2004
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6826291 | Method and system for embedding information into contents | Hiroshi Yoshiura, Isao Echizen, Junichi Taguchi, Akira Maeda, Takao Arai | 2004-11-30 |
| 6804453 | Digital signal recording/reproducing apparatus | Manabu Sasamoto, Hiroo Okamoto, Masaru Takahashi | 2004-10-12 |
| 6785207 | Wobble signal reproducing circuit | Kouichirou Nishimura, Kouichi Hirose, Manabu Katsuki | 2004-08-31 |
| 6778757 | Data recording/reproduction apparatus and method | Osamu Kawamae, Takao Arai, Hiroyuki Kimura | 2004-08-17 |
| 6754442 | Method and apparatus for recording/reproducing digital video signal or audio signal, and optical disk apparatus | Yutaka Nagai, Shigemitsu Higuchi | 2004-06-22 |
| 6728408 | Water-mark embedding method and system | Isao Echizen, Hiroshi Yoshiura, Masafumi Nakamura, Takao Arai | 2004-04-27 |
| 6711276 | Control method and apparatus for embedding information in data | Hiroshi Yoshiura, Isao Echizen, Takao Arai, Hiroyuki Kimura, Yoshiaki Moriyama +2 more | 2004-03-23 |
| 6693966 | Transmitting and recording method, reproducing method, and reproducing apparatus of information and its recording medium | Masafumi Nakamura | 2004-02-17 |
| 6690813 | Method and apparatus for recording and reproducing electronic watermark information, and recording medium | Hiroyuki Kimura, Takao Arai, Hiroshi Yoshiura | 2004-02-10 |
| 6674858 | Receiving device, recording and reproducing device and receiving/recording-reproducing system for digital broadcast signal | Hiroyuki Kimura, Takao Arai | 2004-01-06 |