Lens testing instrument

Details Lens testing instrument Lens testing instrument

1989-06-23

1992-04-28

Ansher, Bernard

Medical and laboratory equipment

Equipment for diagnosis, analysis, or treatment

Ophthalmic

D16130, D16227

Patent

active

D03257827

REFERENCES:
patent: D150412 (1948-08-01), Gordon
patent: D246987 (1978-01-01), Hawkins
patent: D253909 (1980-01-01), Armbruster
patent: 2640392 (1953-06-01), Freeman
patent: 2683392 (1954-07-01), Ellis
patent: 3002285 (1961-10-01), Wright
American Optical Catalog, Jul./1981, p. 1.

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