Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5267068 | Signal transmission performance evaluation device in an optical communication apparatus | — | 1993-11-30 |
| 4794634 | Position-sensitive photodetector and light transmissive tablet and light-emitting pen | Hisaakira Imaizumi, Toru Suzuki, Tomoo Matsuda, Masatake Hirooka, Yokichi Nishi +3 more | 1988-12-27 |
| 4761547 | Semiconductor photoelectric conversion device for light incident position detection | Kazuto Togino, Akira Okamoto, Haruo Hashimoto, Yukitaka Takitani, Hisaakira Imaizumi +1 more | 1988-08-02 |