Photography and optical equipment – Ophthalmic article – Element or attachment
Patent
1993-02-26
1995-01-24
Feifer, Melvin B.
Photography and optical equipment
Ophthalmic article
Element or attachment
Patent
active
D03547604
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patent: 2808632 (1957-10-01), Cline
patent: 3364500 (1968-01-01), Fox
patent: 3397026 (1968-08-01), Spina
patent: 5074656 (1991-12-01), Parrish
patent: 5087118 (1992-02-01), Gill
Barkai R.
Feifer Melvin B.
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