Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7401357 | Authentication system, mobile terminal, and authentication method | Tooru Hasegawa, Akira Kaiyama | 2008-07-15 |
| 6985730 | Mobile communication control method and system | Toru Hasegawa, Takeshi Sugiyama, Akira Kaiyama | 2006-01-10 |
| 6937859 | Mobile communication service control system and mobile communication service control method | Tooru Hasegawa, Akira Kaiyama, Takeshi Sugiyama, Hironari Kobayashi, Hiroshi Matsunaga +1 more | 2005-08-30 |
| 5420850 | Mobile station and cell selecting method for code division multiplex access mobile communication | Narumi Umeda, Akihiro Higashi | 1995-05-30 |