Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6019669 | Lens shape measuring apparatus | Yoshiyuki Hatano, Toshihiro Iwai, Takeshi Nakamura, Hisao Fujinuma, Shinji Uno +1 more | 2000-02-01 |
| 5984763 | Lens shape measuring apparatus | Yoshiyuki Hatano, Toshihiro Iwai, Takeshi Nakamura, Hisao Fujinuma, Shinji Uno +1 more | 1999-11-16 |
| 5895314 | Lens shape measuring apparatus | Yoshiyuki Hatano, Toshihiro Iwai, Takeshi Nakamura, Hisao Fujinuma, Shinji Uno +1 more | 1999-04-20 |
| 5210555 | Ocular refracting power measuring system | Yasuhisa Ishikura | 1993-05-11 |
| 5071245 | Ocular refracting power measuring system | Yasufumi Fukuma, Akio Umeda, Noriyuki Nagai, Yasuhisa Ishikura, Kazutoshi Uchida | 1991-12-10 |
| 4917480 | Eye refractive power measuring apparatus | Yasuo Kato, Kiwami Horiguchi, Yoshihiro Takahashi | 1990-04-17 |
| 4859051 | Eye testing apparatus | Yasufumi Fukuma, Yasuo Kato | 1989-08-22 |
| 4848895 | Automatic eye refractive power measuring apparatus | Yasuo Kato, Kiwami Horiguchi, Shinji Wada | 1989-07-18 |
| 4591247 | Eye refractometer | Minoru Kamiya, Masayuki Masuyama, Shinji Wada, Kiwami Horiguchi | 1986-05-27 |
| 4408847 | Refractory power measuring device | Shinji Wada, Yoshinori Oana, Yasuo Kato, Taketoshi Ishihara | 1983-10-11 |
| 4367019 | Image rotating means for eye refractometers | Kiichi Kamiyama | 1983-01-04 |
| 4306778 | Eye refractmeters using infrared rays | Shinji Wada, Yasuo Kato, Taketoshi Ishihara, Yuji Sugahara | 1981-12-22 |
| 4293199 | Apparatus for detecting astigmatic axes and measuring refractive powers | Shinzi Wada, Yoshinori Oana, Yasuo Kato, Taketoshi Ishihara | 1981-10-06 |
| 4277150 | Eye refractmeter | Shinzi Wada, Yasuo Kato, Taketoshi Ishihara | 1981-07-07 |