Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12070695 | Crossword puzzle generating apparatus and crossword puzzle generating method | Masahiro Hayashi | 2024-08-27 |
| 6970575 | Method of extracting digital watermark information and method of judging bit value of digital watermark information | Isao Echizen, Hiroshi Yoshiura, Kousuke Anzai | 2005-11-29 |
| 6959101 | Method of judging digital watermark information | Hiroshi Yoshiura, Kousuke Anzai | 2005-10-25 |
| 6707927 | Steganographic system, method, program and storage medium therefor | Kazumasa Kita, Hiroshi Yoshiura, Miki Tanaka, Shinobu Eikawa, Tomoyuki Kaji | 2004-03-16 |
| 6665417 | Method of judging digital watermark information | Hiroshi Yoshiura, Kousuke Anzai | 2003-12-16 |
| 6658135 | Recording device | Hajime Morito, Naoko Iwami, Hiroshi Yoshiura, Chisato Konno | 2003-12-02 |
| 6650763 | Method of extracting digital watermark information and method of judging bit value of digital watermark information | Isao Echizen, Hiroshi Yoshiura, Kousuke Anzai | 2003-11-18 |
| 6563935 | Method of extracting digital watermark information and method of judging bit value of digital watermark information | Isao Echizen, Hiroshi Yoshiura, Kousuke Anzai | 2003-05-13 |
| 6456727 | Method of extracting digital watermark information and method of judging but value of digital watermark information | Isao Echizen, Hiroshi Yoshiura, Kousuke Anzai | 2002-09-24 |
| 6418232 | Method of authenticating digital-watermark pictures | Kazunori Nakano, Juńichi Taguchi, Hiroshi Yoshiura, Isao Echizen | 2002-07-09 |
| 5680541 | Diagnosing method and apparatus | Fumitaka Nishiyama, Junji Ishiguro, Tadakazu Kimura | 1997-10-21 |