Issued Patents 2004
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6826291 | Method and system for embedding information into contents | Isao Echizen, Junichi Taguchi, Akira Maeda, Takao Arai, Toshifumi Takeuchi | 2004-11-30 |
| 6775775 | Method of physical individual authentication and system using the same | Ryoichi Sasaki, Mitsuru Iwamura | 2004-08-10 |
| 6728408 | Water-mark embedding method and system | Isao Echizen, Masafumi Nakamura, Takao Arai, Toshifumi Takeuchi | 2004-04-27 |
| 6711276 | Control method and apparatus for embedding information in data | Isao Echizen, Takao Arai, Hiroyuki Kimura, Toshifumi Takeuchi, Yoshiaki Moriyama +2 more | 2004-03-23 |
| 6707927 | Steganographic system, method, program and storage medium therefor | Kazumasa Kita, Yutaka Kurosu, Miki Tanaka, Shinobu Eikawa, Tomoyuki Kaji | 2004-03-16 |
| 6690813 | Method and apparatus for recording and reproducing electronic watermark information, and recording medium | Hiroyuki Kimura, Takao Arai, Toshifumi Takeuchi | 2004-02-10 |