Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5290972 | Stylus pen | Hisao Someya, Takashi Ejiri, Takashi Takizawa, Ryoji Nagano | 1994-03-01 |
| 4903939 | Pneumatically-operated valve | Ryozo Ariizumi, Masakuni Kainuma, Toshikazu Aoki, Shoji Suda, Takashi Ejiri | 1990-02-27 |
| 4875500 | Diaphragm type of pilot operated directional control valve | Ryozo Ariizumi, Masakuni Kainuma, Shoji Suda, Toshikazu Aoki, Takashi Ejiri +1 more | 1989-10-24 |
| 4840347 | Pneumatically-operated valve | Ryozo Ariizumi, Masakuni Kainuma, Toshikazu Aoki, Shoji Suda, Takashi Ejiri | 1989-06-20 |
| 4823834 | Diaphragm type of pilot operated directional control valve | Ryozo Ariizumi, Masakuni Kainuma, Shoji Suda, Toshikazu Aoki, Takashi Ejiri +1 more | 1989-04-25 |
| 4744388 | Diaphragm type of pilot operated directional control valve | Ryozo Ariizumi, Masakuni Kainuma, Shoji Suda, Toshikazu Aoki, Takashi Ejiri +1 more | 1988-05-17 |