Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7508820 | VoIP communication apparatus, number pattern correspondence storing method and number judging method | — | 2009-03-24 |
| 6269084 | Time delay based solution of a telecommunication route | — | 2001-07-31 |
| 6002674 | Network control system which uses two timers and updates routing information | Syouichi Sasaki, Masuhisa Fujimura | 1999-12-14 |