Automatic eye-refraction measuring apparatus with spectacle lens

Details Automatic eye-refraction measuring apparatus with spectacle lens Automatic eye-refraction measuring apparatus with spectacle lens

1992-04-10

1993-11-23

Douglas, Alan P.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Food preparation type

D24172

Patent

active

D03415414

REFERENCES:
patent: D297645 (1988-09-01), Nishimura
patent: D316144 (1991-04-01), Nishimura
patent: D320077 (1991-09-01), Koizumi
patent: D325782 (1992-04-01), Elic
patent: D327024 (1992-06-01), Elic
patent: 4571842 (1986-02-01), Ikezawa et al.
Topcon; CL-2000; Feb. 1989; cover; applicant provided.
Topcon; CL-1500; Apr. 1986; cover; applicant provided.
Nikos; NL-30; cover; applicant provided.

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