Lens testing instrument

Medical and laboratory equipment – Equipment for diagnosis – analysis – or treatment – Ophthalmic

Patent

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Details

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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