Issued Patents All Time
Showing 101–125 of 144 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7949703 | Group admission system and server and client therefor | Toshihisa Nakano, Yuichi Futa | 2011-05-24 |
| 7940927 | Information security device and elliptic curve operating device | Yuichi Futa | 2011-05-10 |
| 7925697 | Group judgment device | Yuichi Futa, Hiroki Yamauchi, Yuusaku Ohta | 2011-04-12 |
| 7886365 | Content-log analyzing system and data-communication controlling device | Yuichi Futa, Motoji Ohmori, Hirohito Kitatora, Makoto Tatebayashi, Kaoru Yokotoa | 2011-02-08 |
| 7774852 | Health care system, key management server and method for managing key, and encrypting device and method for encrypting vital sign data | Kaoru Yokota, Masao Nonaka, Yuichi Futa, Shunji Harada | 2010-08-10 |
| 7752433 | Content-duplication management system, apparatus and method, playback apparatus and method, and computer program | Hiroki Yamauchi, Yuusaku Ohta, Masaya Miyazaki, Toshihisa Abe | 2010-07-06 |
| 7747350 | Robot, hint output device, robot control system, robot control method, robot control program, and integrated circuit | Kaoru Yokota | 2010-06-29 |
| 7739519 | Secure device | Kazuo Sakushima, Makoto Tatebayashi | 2010-06-15 |
| 7698571 | Digital work protection system, record/playback device, recording medium device, and model change device | Shunji Harada, Masaya Miyazaki, Shinichi Matsui, Shinji Inoue, Naohiko Noguchi | 2010-04-13 |
| 7694155 | Digital work protection system, record/playback device, recording medium device, and model change device | Shunji Harada, Masaya Miyazaki, Shinichi Matsui, Shinji Inoue, Naohiko Noguchi | 2010-04-06 |
| 7693795 | Digital work protection system | Masato Yamamichi, Toshihisa Abe, Toshihisa Nakano, Masaya Miyazaki | 2010-04-06 |
| 7555779 | Copyright protection system, recording device, and reproduction device | Toshihisa Nakano, Shunji Harada, Makoto Tatebayashi | 2009-06-30 |
| 7539306 | Key delivery apparatus, terminal apparatus, recording medium, and key delivery system | Yuusaku Ohta, Hiroki Yamauchi, Masaya Miyazaki, Toshihisa Abe | 2009-05-26 |
| 7503066 | Deactivation system | Makoto Tatebayashi | 2009-03-10 |
| 7487351 | Data use management system, transmitting apparatus having management function, and data use management method | Yasushi Ayaki, Naoshi Usuki, Yoshihiro Morioka, Yuusaku Ohta | 2009-02-03 |
| 7457410 | Transmission/reception system | Hiroki Yamauchi, Yuusaku Ohta, Yuichi Futa | 2008-11-25 |
| 7441117 | Group formation/management system, group management device, and member device | Toshihisa Abe, Toshihisa Nakano, Yuichi Futa, Masaya Miyazaki | 2008-10-21 |
| 7395425 | Data protection system that protects data by encrypting the data | Toshihisa Nakano, Motoji Ohmori, Makoto Tatebayashi | 2008-07-01 |
| 7388957 | Elliptic curve exponentiation apparatus that can counter differential fault attack, and information security apparatus | Takatoshi Ono | 2008-06-17 |
| 7386126 | Content protection system, key data generation apparatus, and terminal apparatus | Toshihisa Nakano, Motoji Ohmori, Makoto Tatebayashi, Naoki Yamamoto, Hideshi Ishihara | 2008-06-10 |
| 7359511 | Encryption transmission system | Makoto Tatebayashi, Toshiro Nishio, Hidekazu Suzuki | 2008-04-15 |
| 7349396 | Content distribution system | Yuusaku Ohta, Hiroki Yamauchi, Yuichi Futa | 2008-03-25 |
| 7308583 | Data distribution system | Toshihisa Nakano, Tsutomu Matsumoto | 2007-12-11 |
| 7296147 | Authentication system and key registration apparatus | Makoto Tatebayashi, Kaoru Yokota, Yuichi Futa, Motoji Ohmori, Hirohito Kitatora | 2007-11-13 |
| 7272229 | Digital work protection system, key management apparatus, and user apparatus | Toshihisa Nakano, Makoto Tatebayashi | 2007-09-18 |