Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7489770 | Receiving device, method for incoming call notification, and program | Hiroyuki Nemoto, Shinichi Kashimoto | 2009-02-10 |
| 6639893 | Communication network system including ring network that performs communication through multiple switching devices | Takamitsu Chikenji | 2003-10-28 |