Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5763839 | Device and method for detecting position using electromagnetic induction without producing discrepancy caused by the residual induction voltage of the resonant circuit | Katsuhito Obi | 1998-06-09 |
| 5751229 | Angular information input system | — | 1998-05-12 |
| 5748110 | Angular input information system relative to a tablet for determining an incline angle of a pointer or stylus | Yasushi Sekizawa | 1998-05-05 |
| RE35329 | Electronic blackboard and accessories such as writing tools | Azuma Murakami, Kazuo Aoki, Tsuguya Yamanami, Yoshiaki Tomofuji, Takeshi Tanaka +3 more | 1996-09-17 |
| 5466896 | Position detector | Azuma Murakami, Tsuguya Yamanami | 1995-11-14 |
| 5134689 | Coordinate input system and input implement used in the system | Azuma Murakami, Tsuguya Yamanami, Toshiaki Senda, Toshihide Chikami | 1992-07-28 |
| 5028745 | Position detecting apparatus | Tsuguya Yamanami, Toshiaki Senda | 1991-07-02 |
| 5023408 | Electronic blackboard and accessories such as writing tools | Azuma Murakami, Kazuo Aoki, Tsuguya Yamanami, Yoshiaki Tomofuji, Takeshi Tanaka +3 more | 1991-06-11 |
| 4988837 | Position detecting device | Azuma Murakami, Tsuguya Yamanami, Toshiaki Senda, Kazuo Aoki, Keiichi Siguyama +3 more | 1991-01-29 |
| 4948926 | Position detecting apparatus | Azuma Murakami, Tsuguya Yamanami, Toshiaki Senda | 1990-08-14 |
| 4878553 | Position detecting apparatus | Tsuguya Yamanami, Toshiaki Senda | 1989-11-07 |