Issued Patents All Time
Showing 26–33 of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4812839 | System for controlling network activation sequence | Sumie Okada, Takashi Nara, Yutaka Kawato, Ryoji Shimozono, Kenji Tsutsumi +2 more | 1989-03-14 |
| 4761779 | Subscriber's line switching control system | Takashi Nara, Hiroaki Takeichi, Yoshio Morita, Yutaka Kawato | 1988-08-02 |
| 4754273 | System for controlling network activation sequence | Sumie Okada, Takashi Nara, Yutaka Kawato, Ryoji Shimozono, Kenji Tsutsumi +2 more | 1988-06-28 |
| 4720442 | Photomask blank and photomask | Norihiko Shinkai, Takeshi Haranoh, Junetsu Kanazawa | 1988-01-19 |
| 4698801 | Digital exchange system | Takashi Nara, Yutaka Kawato, Sumie Okada | 1987-10-06 |
| 4497878 | Photomask material | Akira Maruyama | 1985-02-05 |
| 4396683 | Photomask blank provided with a transparent electro-conductive layer | Akira Maruyama, Keiko Hioka | 1983-08-02 |
| 4200719 | Method of production of acrylonitrile polymer with vinylbenzyl sulfonic acids | Kaoru Yamazaki, Shunichiro Kurioka, Sadame Asada, Mariko Yasuda | 1980-04-29 |