Issued Patents All Time
Showing 51–72 of 72 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8650398 | Device authentication using restricted memory | Yuji Nagai, Taku Kato | 2014-02-11 |
| 8634557 | Semiconductor storage device | Yuji Nagai, Toshihiro Suzuki, Noboru Shibata, Taku Kato | 2014-01-21 |
| 8627455 | Manufacturing method of a memory device to be authenticated | Yuji Nagai, Taku Kato | 2014-01-07 |
| 8548169 | Communication apparatus, key server, and data | Toru Kambayashi, Haruhiko Toyama, Toshinori Odaka | 2013-10-01 |
| 8306226 | Transmitting apparatus, receiving apparatus, and content transmitting method | Yoshinobu Fujiwara, Hiroshi Isozaki, Kunio Honsawa, Kazunobu Konda, Chikara Ushimaru +1 more | 2012-11-06 |
| 8175267 | Communication apparatus, communication system, transmission method, and computer program product | Kentaro Umesawa, Ryuiti Koike, Hideki Matsumoto, Taku Kato, Haruhiko Toyama +3 more | 2012-05-08 |
| 8122246 | Method for generating decryption key, apparatus and method using decryption key | — | 2012-02-21 |
| 8041949 | Information processing scheme for realizing contents transfer and copyright protection | Hiroshi Isozaki, Takeshi Saito, Tooru Kamibayashi | 2011-10-18 |
| 7961887 | Content distribution system and tracking system | — | 2011-06-14 |
| 7962745 | Content providing system, user system, tracing system, apparatus, method and program | — | 2011-06-14 |
| 7724906 | Decryption apparatus and decryption method | — | 2010-05-25 |
| 7568094 | Content providing system, user system, tracing system, apparatus, method, and program | — | 2009-07-28 |
| 7565698 | Information-processing device | Hiroshi Isozaki, Takeshi Saito, Tooru Kamibayashi | 2009-07-21 |
| 7545943 | Apparatus, method, and computer program product for playing back content | Tooru Kamibayashi, Taku Kato, Hiroshi Isozaki, Atsushi Ishihara, Yutaka Kashihara +5 more | 2009-06-09 |
| 7535852 | Information-processing device, information-processing method, and information-processing program product | Hiroshi Isozaki | 2009-05-19 |
| 7529935 | Information communication device, information communication system, and computer program product for transmission control | Takeshi Saito, Hiroshi Isozaki, Taku Kato, Tooru Kamibayashi | 2009-05-05 |
| 7182264 | IC-card service period setting method, IC card, IC card case and battery charger | Yuuki Tomoeda, Hiroshi Watanabe, Hideo Shimizu, Kenji Kojima, Kentaro Umesawa +1 more | 2007-02-27 |
| 7182251 | IC-card service period setting method, IC card, IC card case and battery charger | Yuuki Tomoeda, Hiroshi Watanabe, Hideo Shimizu, Kenji Kojima, Kentaro Umesawa +1 more | 2007-02-27 |
| 7134600 | IC-card service period setting method, IC card, IC card case and battery charger | Yuuki Tomoeda, Hiroshi Watanabe, Hideo Shimizu, Kenji Kojima, Kentaro Umesawa +1 more | 2006-11-14 |
| 7121472 | Semiconductor integrated circuit, semiconductor integrated circuit module and information apparatus | Hideo Shimizu, Kenji Kojima, Yuuki Tomoeda, Kentaro Umesawa, Hideyuki Miyake +1 more | 2006-10-17 |
| 6945467 | IC card, and method and program for preventing illegal use of IC card | Kenji Kojima, Kentaro Umesawa, Hideyuki Miyake, Yuuki Tomoeda, Hideo Shimizu +1 more | 2005-09-20 |
| 6811083 | IC card, and method and program for preventing illegal use of IC card | Kenji Kojima, Kentaro Umesawa, Hideyuki Miyake, Yuuki Tomoeda, Hideo Shimizu +1 more | 2004-11-02 |