Issued Patents All Time
Showing 1–25 of 63 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8346061 | Digital signal recording/reproducing apparatus, receiving apparatus | Toru Matsumura, Hiroo Okamoto, Hiroyuki Kimura | 2013-01-01 |
| 8311219 | Reproducing apparatus, recording apparatus and display apparatus | Osamu Kawamae, Toshifumi Takeuchi, Hiroyuki Kimura, Takao Arai | 2012-11-13 |
| 8074071 | Reproducing apparatus, recording apparatus and display apparatus | Osamu Kawamae, Toshifumi Takeuchi, Hiroyuki Kimura, Takao Arai | 2011-12-06 |
| 7779256 | Reproducing apparatus, recording apparatus and display apparatus | Osamu Kawamae, Toshifumi Takeuchi, Hiroyuki Kimura, Takao Arai | 2010-08-17 |
| 7711714 | Method and a device for sterilizing downloaded files | Kazuo Takaragi, Seiichi Domyo | 2010-05-04 |
| 7694126 | Method and system for recovering the validity of cryptographically signed digital data | Kunihiko Miyazaki, Seiichi Susaki, Ryoichi Sasaki, Kazuo Takaragi, Hisashi Toyoshima +1 more | 2010-04-06 |
| 7526645 | Electronic document authenticity assurance method and electronic document disclosure system | Kunihiko Miyazaki, Mitsuru Iwamura, Tsutomu Matsumoto, Ryoichi Sasaki, Hirokazu Aoshima +3 more | 2009-04-28 |
| 7499565 | Method of watermarking for binary images | Yasuhiro Fujii, Kazunori Nakano, Isao Echizen | 2009-03-03 |
| 7478432 | Method and system for contents control | Isao Echizen, Kunihiko Miyazaki, Kousuke Anzai, Jun'ichi Taguchi, Kazunori Nakano +1 more | 2009-01-13 |
| 7441115 | Method for verifying a digital signature | Kunihiko Miyazaki, Narihiro Omoto, Shinji Itoh, Kouichi Tanimoto | 2008-10-21 |
| 7379547 | Reproducing apparatus, recording apparatus and display apparatus | Osamu Kawamae, Toshifumi Takeuchi, Hiroyuki Kimura, Takao Arai | 2008-05-27 |
| 7317738 | Data transmission method for embedded data, data transmitting and reproducing apparatuses and information recording medium therefor | Osamu Kawamae, Toshifumi Takeuchi, Takao Arai | 2008-01-08 |
| 7310428 | Method of detecting digital watermark information | Kousuke Anzai, Isao Echizen | 2007-12-18 |
| 7293294 | Method and apparatus for using contents | Hiromi Ukai, Shigeki Hirasawa, Kousuke Anzai, Isao Echizen, Masataka Okayama +1 more | 2007-11-06 |
| 7248607 | Data transmission method for embedded data, data transmitting and reproducing apparatuses and information recording medium therefor | Osamu Kawamae, Toshifumi Takeuchi, Takao Arai | 2007-07-24 |
| 7224820 | Electronic document, genuineness management method for print medium thereof, genuineness management system, program, and program recording medium | Hirofumi Inomata, Takeshi Matsuki, Hideo Noyama | 2007-05-29 |
| 7210043 | Trusted computer system | Kunihiko Miyazaki, Shinji Itoh, Kazuo Takaragi, Masato Arai, Toshiaki Arai +2 more | 2007-04-24 |
| 7200682 | Time stamp generating system | Kunihiko Miyazaki, Seiichi Susaki, Kazuo Takaragi, Takeshi Matsuki, Hisashi Toyoshima +3 more | 2007-04-03 |
| 7151888 | Method and apparatus for temporarily giving copy permission for reproducing digital signals | Tooru Matsumura, Hiroo Okamoto, Hiroyuki Kimura | 2006-12-19 |
| 7139759 | Method and a device for managing a computer network | Kazuo Takaragi, Seiichi Domyo | 2006-11-21 |
| 7134021 | Method and system for recovering the validity of cryptographically signed digital data | Kunihiko Miyazaki, Seiichi Susaki, Ryoichi Sasaki, Kazuo Takaragi, Hisashi Toyoshima +1 more | 2006-11-07 |
| 7113613 | Watermark information detection method | Isao Echizen, Hiroyuki Kimura, Akio Fukushima, Kousuke Anzai | 2006-09-26 |
| 7065226 | Method for embedding information and extracting the same | Kousuke Anzai, Isao Echizen, Shinobu Eikawa | 2006-06-20 |
| 7047412 | Digital watermark data embedding method, and digital watermark data embeddability analyzing method | Isao Echizen, Ryoichi Sasaki, Shinichiro Harano, Shinobu Eikawa | 2006-05-16 |
| 7043645 | Reproducing apparatus, recording apparatus and display apparatus | Osamu Kawamae, Toshifumi Takeuchi, Hiroyuki Kimura, Takao Arai | 2006-05-09 |