Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE33936 | Electronic blackboard apparatus | Yoshiaki Tomofuji, Kiyosato Izawa, Youichi Tsuchida | 1992-05-26 |
| 4988837 | Position detecting device | Azuma Murakami, Tsuguya Yamanami, Takahiko Funahashi, Toshiaki Senda, Kazuo Aoki +3 more | 1991-01-29 |
| 4711977 | Electronic blackboard apparatus | Yoshiaki Tomofuji, Kiyosato Izawa, Youichi Tsuchida | 1987-12-08 |