Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7747744 | Mobile communication system and data transferring method for use with mobile communication system | — | 2010-06-29 |
| 7343344 | Electronic payment system using accounting function in a mobile communication network | — | 2008-03-11 |
| 6950390 | Mobile communication system and gateway selecting method thereof | — | 2005-09-27 |
| 6233447 | Mobile communication system and a method of incoming call restriction | — | 2001-05-15 |
| 6016318 | Virtual private network system over public mobile data network and virtual LAN | — | 2000-01-18 |
| 5940512 | Roaming method capable of improving roaming registration procedure | — | 1999-08-17 |
| 5790955 | Mobile communication system which performs communication restriction control | — | 1998-08-04 |
| 5613214 | Mobile communication terminal authenticating system | Susumu Shirasawa, Kenichiro Kamachi | 1997-03-18 |