Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7292684 | User information management program and user information management device | — | 2007-11-06 |
| 7035388 | Caller identifying method, program, and apparatus and recording medium | — | 2006-04-25 |
| 6498842 | Switching system between a call center and public network | Toshiyuki Saito | 2002-12-24 |
| 5648154 | Inorganic constructional board and method of manufacturing the same | Akio Koh, Hisashi Fujiwara, Shigezoh Masamoto, Keiji Shutoh | 1997-07-15 |
| 5335271 | Ring trip detection circuit | Kenji Takato, Kazumi Kinoshita, Taichi Kosako, Kazuyuki Minohara | 1994-08-02 |