Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4787743 | Apparatus for measuring the radius of curvature | — | 1988-11-29 |
| 4702596 | Apparatus for measuring the refractive power of an optical system | — | 1987-10-27 |
| 4572628 | Method of and apparatus for measuring radius | — | 1986-02-25 |
| 4534645 | Automatic lens meter | — | 1985-08-13 |
| 4529280 | Apparatus for subjectively measuring the refractive power of an eye | — | 1985-07-16 |
| 4526451 | Apparatus for measuring the refractive power of an optical system | — | 1985-07-02 |
| 4449798 | Eye fundus observation apparatus | — | 1984-05-22 |
| 4447717 | Automatic focusing device in a stereoscopic microscope | — | 1984-05-08 |
| 4431278 | Eye examining apparatus | — | 1984-02-14 |
| 4390255 | Eye-refractometer device | Izumi Umemura, Toshiyuki Arai | 1983-06-28 |
| 4370034 | Ophthalmological instrument of continuously variable magnification | — | 1983-01-25 |
| 4364646 | Position adjusting device for ophthalmologic instrument | — | 1982-12-21 |
| 4353625 | Eye-refractometer device | Izumi Umemura | 1982-10-12 |
| 4322137 | Fundus observation and photographing optical system | — | 1982-03-30 |
| 4247200 | Projection type lens meter | Kazuo Morohashi | 1981-01-27 |