Issued Patents All Time
Showing 26–50 of 63 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6990584 | Method of and apparatus for restricting copy of digital information, and apparatus for recording digital information | Hiroyuki Kimura, Akira Ogino, Yoshiaki Moriyama, Kazumi Sugaya | 2006-01-24 |
| 6970575 | Method of extracting digital watermark information and method of judging bit value of digital watermark information | Isao Echizen, Yutaka Kurosu, Kousuke Anzai | 2005-11-29 |
| 6959101 | Method of judging digital watermark information | Kousuke Anzai, Yutaka Kurosu | 2005-10-25 |
| 6954856 | Additional information embedding method, additional information detecting method, additional information embedding apparatus and additional information detecting apparatus | Takashi Kohashi, Akira Ogino, Hiroyuki Kimura, Yoshiaki Moriyama, Kazumi Sugaya | 2005-10-11 |
| 6889211 | Method and system for distributing multimedia data with management information | Ryoichi Sasaki | 2005-05-03 |
| 6879978 | System and method of searching for electronic data | Hirokazu Aoshima, Eiichi Kamada, Atsushi Kikuta | 2005-04-12 |
| 6865677 | Contents rendering control method, contents reproducing equipment, and contents distribution equipment | Isao Echizen, Ryoichi Sasaki, Shinichiro Harano, Shinobu Eikawa | 2005-03-08 |
| 6865553 | Copy protection apparatus and method | Hajime Morito, Michael Roe | 2005-03-08 |
| 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 |
| 6665417 | Method of judging digital watermark information | Kousuke Anzai, Yutaka Kurosu | 2003-12-16 |
| 6658135 | Recording device | Hajime Morito, Naoko Iwami, Chisato Konno, Yutaka Kurosu | 2003-12-02 |
| 6650763 | Method of extracting digital watermark information and method of judging bit value of digital watermark information | Isao Echizen, Yutaka Kurosu, Kousuke Anzai | 2003-11-18 |
| 6584210 | Digital watermark image processing method | Junichi Taguchi, Isao Echizen, Akira Maeda, Takao Arai, Toshifumi Takeuchi | 2003-06-24 |
| 6578149 | METHOD FOR REPRODUCING DATA, APPARATUS FOR REPRODUCING DATA, METHOD FOR CODING DATA, METHOD FOR RECORDING DATA, APPARATUS FOR RECORDING AND REPRODUCING DATA, METHOD FOR AUTHENTICATION, SEMICONDUCTOR CHIP, REPRODUCING APPARATUS, RECORDING APPARATUS AND DATA PROCESSING APPARATUS | Osamu Kawamae, Toshifumi Takeuchi, Hiroyuki Kimura, Takao Arai | 2003-06-10 |
| 6563935 | Method of extracting digital watermark information and method of judging bit value of digital watermark information | Isao Echizen, Kousuke Anzai, Yutaka Kurosu | 2003-05-13 |
| 6535614 | Method and apparatus for recording and reproducing electronic watermark information, and recording medium | Hiroyuki Kimura, Takao Arai, Toshifumi Takeuchi | 2003-03-18 |
| 6519351 | Method and apparatus for recording and reproducing electronic watermark information, and recording medium | Hiroyuki Kimura, Takao Arai, Toshifumi Takeuchi | 2003-02-11 |
| 6504931 | Method and apparatus for encrypting data | Kazuo Takaragi, Mayuko Shimizu | 2003-01-07 |
| 6499105 | Digital data authentication method | Kazuo Takaragi, Ryoichi Sasaki, Seiichi Susaki, Hisashi Toyoshima, Tsukasa Saito | 2002-12-24 |
| 6456727 | Method of extracting digital watermark information and method of judging but value of digital watermark information | Isao Echizen, Yutaka Kurosu, Kousuke Anzai | 2002-09-24 |