Photography and optical equipment – Ophthalmic article – Element or attachment
Patent
1996-03-29
1997-02-25
Barkai, Raphael
Photography and optical equipment
Ophthalmic article
Element or attachment
Patent
active
D03782174
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patent: D176000 (1955-11-01), Belgard
patent: 1083702 (1914-01-01), Persohn
patent: 1138012 (1915-05-01), Perkins
patent: 4461549 (1984-07-01), Reese et al.
patent: 4720186 (1988-01-01), Douillard
patent: 4750828 (1988-06-01), Sartor
patent: 5323189 (1994-06-01), Contreras
patent: 5450142 (1995-09-01), Brhel
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