Issued Patents All Time
Showing 176–200 of 225 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7631361 | Content reproduction system | Masato Yamamichi, Satomi Yamamichi, Keiko Yamamichi, Masaya Yamamoto, Kazuhisa Watanabe +2 more | 2009-12-08 |
| 7617536 | Unauthorized device detection device, unauthorized device detection system, unauthorized device detection method, program, recording medium, and device information update method | Masao Nonaka, Toshihisa Nakano, Yuichi Futa, Takeshi Gomi, Kazukuni Kobara +1 more | 2009-11-10 |
| 7603554 | Encryption communication system | Yuichi Futa, Masato Yamamichi, Makoto Tatebayashi | 2009-10-13 |
| 7567487 | Content moving device, content moving method, computer program, recording medium, and content moving system | Yoshikatsu Ito, Masaya Miyazaki, Shunji Harada, Kaoru Yokota, Toshihisa Nakano +1 more | 2009-07-28 |
| 7555129 | Content playback apparatus, content playback method, and program | Masaya Yamamoto, Kazuhisa Watanabe, Atsushi Saso, Naoaki Yamamoto, Masato Yamamichi | 2009-06-30 |
| 7549061 | Unauthorized contents detection system | Masao Nonaka, Yuichi Futa, Toshihisa Nakano, Kaoru Yokota, Masaya Miyazaki +3 more | 2009-06-16 |
| 7542568 | Encryption device a decrypting device a secret key generation device a copyright protection system and a cipher communication device | Makoto Tatebayashi, Takahiro Nagai, Hideshi Ishihara | 2009-06-02 |
| RE40710 | Data converter for performing exponentiation in polynomial residue class ring with value in finite field as coefficient | Masato Yamamichi, Makoto Tatebayashi, Makoto Usui, Kaoru Yokota | 2009-05-12 |
| 7519685 | Contents linkage information delivery system | Masao Nonaka, Masato Yamamichi, Masaya Yamamoto, Wataru Ikeda, Masataka Minami +2 more | 2009-04-14 |
| 7486789 | Device and method for calculation on elliptic curve | Yuichi Futa | 2009-02-03 |
| 7484090 | Encryption apparatus, decryption apparatus, secret key generation apparatus, and copyright protection system | Makoto Tatebayashi, Hideshi Ishihara, Toshihisa Nakano | 2009-01-27 |
| 7471792 | Key agreement system, shared-key generation apparatus, and shared-key recovery apparatus | Masato Yamamichi, Makoto Tatebayashi, Yuichi Futa | 2008-12-30 |
| 7448087 | System for preventing unauthorized use of recording media | Kenichi Ueda, Eiji Ueda | 2008-11-04 |
| 7434898 | Computer system, computer program, and addition method | Yuichi Futa, Hiroyuki Shizuya, Masahiro Mambo, Masato Yamamichi | 2008-10-14 |
| 7427022 | Ticket management system, terminal device, ticket management server, register device, value conversion method, computer program, and recording medium | Kaoru Yokota, Hisashi Takayama, Atsushi Saso | 2008-09-23 |
| 7426494 | Rental system | Yuichi Futa, Makoto Tatebayashi | 2008-09-16 |
| 7401232 | Content playback apparatus method and program and key management apparatus and system | Takatoshi Ono, Yoji Kumazaki, Shigeru Yamada, Hiroki Murakami, Tetsuya Inoue | 2008-07-15 |
| 7394902 | Encryption apparatus, decryption apparatus and encryption system | Masato Yamamichi, Yuichi Futa, Makoto Tatebayashi | 2008-07-01 |
| 7395425 | Data protection system that protects data by encrypting the data | Toshihisa Nakano, Natsume Matsuzaki, Makoto Tatebayashi | 2008-07-01 |
| 7386126 | Content protection system, key data generation apparatus, and terminal apparatus | Toshihisa Nakano, Natsume Matsuzaki, Makoto Tatebayashi, Naoki Yamamoto, Hideshi Ishihara | 2008-06-10 |
| 7386618 | Distribution system, distribution apparatus, and reception apparatus for distributing contents having usage expiry | Yuichi Futa, Makoto Tatebayashi, Masaya Yamamoto | 2008-06-10 |
| 7373503 | Public key certificate revocation list generation apparatus, revocation judgement apparatus, and authentication system | Toshihisa Nakano, Makoto Tatebayashi, Hideshi Ishihara | 2008-05-13 |
| 7353543 | Contents distribution system | Masataka Minami, Masaya Yamamoto | 2008-04-01 |
| 7296147 | Authentication system and key registration apparatus | Natsume Matsuzaki, Makoto Tatebayashi, Kaoru Yokota, Yuichi Futa, Hirohito Kitatora | 2007-11-13 |
| 7287690 | Value holding system, value holding method, value holding program, and transaction system | Toshihisa Nakano | 2007-10-30 |