Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7748041 | Tool, method, and program for supporting system security design/evaluation | Masato Arai, Yasuhiko Nagai, Hidaka Matsumoto | 2010-06-29 |
| 7478432 | Method and system for contents control | Isao Echizen, Hiroshi Yoshiura, Kunihiko Miyazaki, Jun'ichi Taguchi, Kazunori Nakano +1 more | 2009-01-13 |
| 7310428 | Method of detecting digital watermark information | Isao Echizen, Hiroshi Yoshiura | 2007-12-18 |
| 7293294 | Method and apparatus for using contents | Hiromi Ukai, Shigeki Hirasawa, Isao Echizen, Hiroshi Yoshiura, Masataka Okayama +1 more | 2007-11-06 |
| 7113613 | Watermark information detection method | Isao Echizen, Hiroshi Yoshiura, Hiroyuki Kimura, Akio Fukushima | 2006-09-26 |
| 7065226 | Method for embedding information and extracting the same | Isao Echizen, Hiroshi Yoshiura, Shinobu Eikawa | 2006-06-20 |
| 6970575 | Method of extracting digital watermark information and method of judging bit value of digital watermark information | Isao Echizen, Hiroshi Yoshiura, Yutaka Kurosu | 2005-11-29 |
| 6959101 | Method of judging digital watermark information | Hiroshi Yoshiura, Yutaka Kurosu | 2005-10-25 |
| 6665417 | Method of judging digital watermark information | Hiroshi Yoshiura, Yutaka Kurosu | 2003-12-16 |
| 6650763 | Method of extracting digital watermark information and method of judging bit value of digital watermark information | Isao Echizen, Hiroshi Yoshiura, Yutaka Kurosu | 2003-11-18 |
| 6563935 | Method of extracting digital watermark information and method of judging bit value of digital watermark information | Isao Echizen, Hiroshi Yoshiura, Yutaka Kurosu | 2003-05-13 |
| 6456727 | Method of extracting digital watermark information and method of judging but value of digital watermark information | Isao Echizen, Hiroshi Yoshiura, Yutaka Kurosu | 2002-09-24 |