High power spectacle lens

Details High power spectacle lens High power spectacle lens

1991-06-24

1993-04-13

Ansher, Bernard

Photography and optical equipment

Ophthalmic article

Lens

Patent

active

D03347575

REFERENCES:
patent: 2172573 (1939-09-01), Blumenthal
patent: 3202046 (1965-08-01), Roos
patent: 4714329 (1987-12-01), Hellstrom

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