Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8989054 | IP device exchange apparatus and call connection changing method | — | 2015-03-24 |
| 7738649 | Computer system using identification information and control method thereof | Ryota Nonaka, Koji Abe, Toru Imamura | 2010-06-15 |
| 6212394 | Radio communication system | — | 2001-04-03 |
| 5815816 | Method for managing communication channels in mobile telecommunications system and radiotelephone system for use therein | — | 1998-09-29 |