Photography and optical equipment – Ophthalmic article
Patent
1990-06-22
1991-12-31
Ansher, Bernard
Photography and optical equipment
Ophthalmic article
Patent
active
D03227960
REFERENCES:
patent: D380875 (1990-06-01), Hsu
patent: 2730924 (1956-01-01), De Angelis
patent: 3838914 (1974-10-01), Fernandez
Accessories, Dec. 1986, p. 4 (Spectacles Digest).
Ansher Bernard
Barkai R.
Litman Richard C.
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