Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11431706 | Communication control system and communication control device | Kei Sugibuchi, Hiroki Fukuoka | 2022-08-30 |
| 8469278 | Information storage medium | — | 2013-06-25 |
| 7182264 | IC-card service period setting method, IC card, IC card case and battery charger | Hiroshi Watanabe, Hideo Shimizu, Kenji Kojima, Tatsuyuki Matsushita, Kentaro Umesawa +1 more | 2007-02-27 |
| 7182251 | IC-card service period setting method, IC card, IC card case and battery charger | Hiroshi Watanabe, Hideo Shimizu, Kenji Kojima, Tatsuyuki Matsushita, Kentaro Umesawa +1 more | 2007-02-27 |
| 7159115 | Method and apparatus for encrypting data | Koichi Fujisaki, Atsushi Shimbo, Masahiko Motoyama, Hanae Ikeda | 2007-01-02 |
| 7134600 | IC-card service period setting method, IC card, IC card case and battery charger | Hiroshi Watanabe, Hideo Shimizu, Kenji Kojima, Tatsuyuki Matsushita, Kentaro Umesawa +1 more | 2006-11-14 |
| 7121472 | Semiconductor integrated circuit, semiconductor integrated circuit module and information apparatus | Hideo Shimizu, Kenji Kojima, Tatsuyuki Matsushita, 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, Tatsuyuki Matsushita, 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, Tatsuyuki Matsushita, Hideo Shimizu +1 more | 2004-11-02 |