Issued Patents All Time
Showing 26–50 of 64 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7428307 | Data reproduction apparatus capable of safely controlling reproduction time of encrypted content data and data reproduction circuit and data recording apparatus used for the same | Yoshihiro Hori, Tatsuya Hirai | 2008-09-23 |
| 7383446 | Recording device | Masayuki Hatanaka, Jun Kamada, Takahisa Hatakeyama, Seigou Kotani, Tadaaki Tonegawa +4 more | 2008-06-03 |
| 7340055 | Memory card and data distribution system using it | Yoshihiro Hori, Toshiaki Hioki, Miwa Kanamori, Takatoshi Yoshikawa, Hiroshi Takemura +5 more | 2008-03-04 |
| 7325247 | Information management method using a recording medium with a secure area and a user-use area | Seigo Kotani, Hideyuki Hirano | 2008-01-29 |
| 7272720 | Date-and-time management device and signature generation apparatus with date-and-time management function | Seigo Kotani | 2007-09-18 |
| RE39802 | Storage medium for preventing an irregular use by a third party | Ryota Akiyama, Makoto Yoshioka | 2007-08-28 |
| 7219227 | Data distribution system and recording device and data provision device used therefor | Yoshihiro Hori, Toshiaki Hioki, Miwa Kanamori, Takatoshi Yoshikawa, Hiroshi Takemura +5 more | 2007-05-15 |
| 7203312 | Data reproduction apparatus and data reproduction module | Masayuki Hatanaka, Jun Kamada, Takahisa Hatakeyama, Seigou Kotani, Shigeki Furuta +4 more | 2007-04-10 |
| 7191155 | License transmitting and distributing system under offline environment and method thereof | Hidefumi Maruyama, Takahisa Hatakeyama, Tetsuhiro Chiba | 2007-03-13 |
| 7181629 | Data distribution system as well as data supply device terminal device and recording device for the same | Masayuki Hatanaka, Jun Kamada, Takahisa Hatakeyama, Seigou Kotani, Shigeki Furuta +5 more | 2007-02-20 |
| 7158641 | Recorder | Yoshihiro Hori, Toshiaki Hioki, Miwa Kanamori, Seigou Kotani, Takahisa Hatakeyama +2 more | 2007-01-02 |
| 7147150 | Personal identification terminal and method having selectable identification means or identification levels | Souichi Okada, Jun Kamada, Takehiko Hayashi | 2006-12-12 |
| 7013392 | File processing unit | Takaoki Sasaki, Takeshi Hatano, Ryota Akiyama, Seigo Kotani | 2006-03-14 |
| 7010127 | Cryptographic communication method, file access system and recording medium | Seigo Kotani, Takaoki Sasaki, Yusuke Yamanaka, 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 | Seigo Kotani, Ryota Akiyama, Takaoki Sasaki | 2006-02-14 |
| 6999948 | Memory card | Masayuki Hatanaka, Jun Kamada, Takahisa Hatakeyama, Seigou Kotani, Shigeki Furuta +5 more | 2006-02-14 |
| 6898708 | Device for reproducing data | Yoshihiro Hori, Toshiaki Hioki, Miwa Kanamori, Takatoshi Yoshikawa, Hiroshi Takemura +3 more | 2005-05-24 |
| 6829592 | Data protection system, data preparation device, and data working device | Naoya Torii, Masahiko Takenaka, Souichi Okada, Yuji Kijima | 2004-12-07 |
| 6687835 | Command authorization method | Hideyuki Hirano, Seigo Kotani | 2004-02-03 |
| 6434623 | Data transmission and data receiving apparatus that obtains file differences during transmission | Kenichi Sasaki, Tatsuro Matsumoto, Hiroaki Kato, Morito Yamamoto, Takashi Matsushima | 2002-08-13 |
| 6385726 | Software license protection via cryptography | Naoya Torii, Masahiko Takenaka | 2002-05-07 |
| 5953416 | Data processing apparatus | Naoya Torii, Masahiko Takenaka | 1999-09-14 |
| 5935243 | Licensee notification system | Naoya Torii | 1999-08-10 |
| 5917908 | File protection system, software utilization system using the file protection system and storage medium used in the software utilization system | Masahiko Takenaka, Naoya Torii, Noboru Iwayama | 1999-06-29 |
| 5838791 | Encoder and decoder | Naoya Torii, Noboru Iwayama, Masahiko Takenaka, Masahiro Matsuda | 1998-11-17 |