Issued Patents All Time
Showing 151–175 of 225 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7891013 | Contents distribution system | Masataka Minami, Masaya Yamamoto | 2011-02-15 |
| 7889863 | Recording device, recording medium, and content protection system | Shunji Harada, Yoshikatsu Ito, Toshihisa Nakano, Kaoru Yokota, Jun Takahashi | 2011-02-15 |
| 7886365 | Content-log analyzing system and data-communication controlling device | Yuichi Futa, Hirohito Kitatora, Natsume Matsuzaki, Makoto Tatebayashi, Kaoru Yokotoa | 2011-02-08 |
| 7860255 | Content distribution server, key assignment method, content output apparatus, and key issuing center | Masao Nonaka, Yuichi Futa, Shigeru Yamada, Tetsuya Inoue, Yoji Kumazaki | 2010-12-28 |
| 7856168 | Recorder/reproducer and content data protection system for preventing unauthorized use of content | Jun Takahashi, Masaya Miyazaki, Kaoru Yokota, Toshihisa Nakano, Shunji Harada +1 more | 2010-12-21 |
| 7831831 | Authentication communication system, authentication communication apparatus, and authentication communication method | Toshihisa Nakano, Takahiro Nagai, Hideshi Ishihara, Makoto Tatebayashi | 2010-11-09 |
| 7823212 | Securely aggregating content on a storage device | Masato Yamamichi, Masaya Yamamoto, Yasushi Uesaka, Hiroshi Hamasaka | 2010-10-26 |
| 7813512 | Encrypted communication system and communication device | Yuichi Futa, Masato Yamamichi, Makoto Tatebayashi | 2010-10-12 |
| 7792295 | Monitoring camera system, imaging device, and video display device | Kaoru Yokota, Kazuhisa Watanabe, Atsushi Saso, Mizuho Sakakibara, Naoaki Yamamoto | 2010-09-07 |
| 7792286 | Signature generation device and signature verification device | Yuichi Futa, Shingo Hasegawa, Shuji Isobe, Hiroki Shizuya | 2010-09-07 |
| 7783884 | Content providing system, information processing device and memory card | Toshihisa Nakano, Shunji Harada | 2010-08-24 |
| 7773746 | Encryption system, encryption device, decryption device, program, and integrated circuit | Yuichi Futa, Masato Yamamichi | 2010-08-10 |
| 7760988 | Content use device and recording medium | Masaya Yamamoto, Toshihisa Nakano, Ryuichi Okamoto | 2010-07-20 |
| 7747491 | Anonymous information system, information registering device and information storing device | Kaoru Yokota, Akinobu Ito | 2010-06-29 |
| 7743261 | Unauthorized contents detection system | Masao Nonaka, Yuichi Futa, Toshihisa Nakano, Kaoru Yokota, Masaya Miyazaki +3 more | 2010-06-22 |
| 7739504 | Signature generation apparatus and signature verification apparatus | Yuichi Futa, Shingo Hasegawa, Shuji Isobe, Hiroki Shizuya | 2010-06-15 |
| 7739145 | Sales system and recording medium | Yoshiaki Iwata | 2010-06-15 |
| 7724897 | Program converter, encrypting device, and encrypting method | Kaoru Yokota, Yuichi Futa | 2010-05-25 |
| 7706528 | Prime calculating apparatus, key issuing system, and prime calculation method | Yuichi Futa | 2010-04-27 |
| 7702109 | Content recording/reproducing system, distribution device, reproducing device, and recording device | Yuichi Futa, Masato Yamamichi, Masaya Yamamoto, Makoto Tatebayashi | 2010-04-20 |
| 7698743 | Authentication server, method and system for detecting unauthorized terminal | Shunji Ohara, Takashi Katayama | 2010-04-13 |
| 7664260 | Signature generation device, key generation device, and signature generation method | Yuichi Futa, Shingo Hasegawa, Shuji Isobe, Hiroki Shizuya | 2010-02-16 |
| 7647343 | Information presentation system, management device, and terminal device | Masato Yamamichi, Masaya Yamamoto, Kazuhisa Watanabe, Atsushi Saso, Naoaki Yamamoto | 2010-01-12 |
| 7647646 | Information input/output system, key management device, and user device | Toshihisa Nakano, Makoto Tatebayashi, Hideshi Ishihara | 2010-01-12 |
| 7634084 | Prime calculation device, method, and key issuing system | Yuichi Futa | 2009-12-15 |