Issued Patents All Time
Showing 26–50 of 58 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7660992 | Electronic data storage system and method thereof | Yasuyuki Higashiura, Takumi Kishino, Keizo Sato, Shoki Kadowaki | 2010-02-09 |
| 7513411 | Method of and apparatus for granting electronic signature, and computer program | Nobuo Yoshikawa, Takayuki Katou, Nao Ando | 2009-04-07 |
| 7512801 | Authentication system, authentication method, signing apparatus, signing method, certifying apparatus, certifying method, and a computer-readable recording medium with a program making a computer execute the method recording therein | Ryota Akiyama, Takayuki Hasebe, Takaoki Sasaki | 2009-03-31 |
| 7477742 | Method and apparatus for controlling contents utilization, and a computer product | Bintatsu Noda, Takehiko Hayashi, Jun Kamada | 2009-01-13 |
| 7412721 | Method of and system for managing information, and computer product | Satoru Torii, Masashi Mitomo, Fumie Takizawa | 2008-08-12 |
| 7330973 | Safety judgment method, safety judgment system, safety judgment apparatus, first authentication apparatus, and computer program product | — | 2008-02-12 |
| 7325247 | Information management method using a recording medium with a secure area and a user-use area | Takayuki Hasebe, Hideyuki Hirano | 2008-01-29 |
| 7272720 | Date-and-time management device and signature generation apparatus with date-and-time management function | Takayuki Hasebe | 2007-09-18 |
| 7246377 | Method and apparatus for mediation of security information, and a computer product | Masahiro Komura, Satoru Torii | 2007-07-17 |
| 7145492 | Data management method | Hideyuki Hirano, Shinji Hashimoto | 2006-12-05 |
| 7028340 | Apparatus, a system and method for controlling access to contents | Jun Kamada, Etsuo Ono, Massayuki Hatanaka, Masatoshi Yoshida, Takahiro Nakai | 2006-04-11 |
| 7013392 | File processing unit | Takaoki Sasaki, Takeshi Hatano, Ryota Akiyama, Takayuki Hasebe | 2006-03-14 |
| 7010127 | Cryptographic communication method, file access system and recording medium | Takaoki Sasaki, Yusuke Yamanaka, Takayuki Hasebe, Ryota Akiyama | 2006-03-07 |
| 7000114 | Apparatus to create and/or verify digital signatures having a secure time element and an identifier of the apparatus | Takayuki Hasebe, Ryota Akiyama, Takaoki Sasaki | 2006-02-14 |
| 6999947 | License devolution apparatus | Kenichi Utsumi, Hideyuki Hirano | 2006-02-14 |
| 6965996 | Method for facilitating legitimate use of digital content | Hideyuki Hirano, Shinji Hashimoto, Kazuhiko Muramoto | 2005-11-15 |
| 6795834 | Apparatus, method, and storage medium for file management | Yasuyuki Higashiura, Takumi Kishino, Takashi Yoshioka, Keizo Sato, Hiroki Inoue | 2004-09-21 |
| 6687835 | Command authorization method | Hideyuki Hirano, Takayuki Hasebe | 2004-02-03 |
| 6507910 | Timer apparatus and computer | — | 2003-01-14 |
| 6480963 | Network system for transporting security-protected data | Hirotaka Tachibana, Seiichi Urita, Takehiko Hayashi | 2002-11-12 |
| 6324157 | Information recording medium capable of being tested for authenticity | — | 2001-11-27 |
| 6253331 | Timer apparatus and computer | — | 2001-06-26 |
| 6247131 | Information management method and recording medium | Makoto Yoshioka, Keiichi Murakami, Hideyuki Hirano, Takehiko Hayashi, Shinichi Yoshimoto | 2001-06-12 |
| 6173390 | Storage medium driving device, storage medium and data protecting method | Naoya Torii, Jun Kamada | 2001-01-09 |
| 5987029 | Information collecting apparatus, receiving information processing apparatus and information transmitting apparatus | Toshimitsu Suzuki | 1999-11-16 |