NEEEFE,CHARLES W.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4239712 Method of making bifocal contact lensesExpiredMar 15, 79Dec 16, 80[B29D]
4231905 Polymethylmethacrylate cellulosic copolymer lens materialExpiredJun 25, 79Nov 04, 80[C08L]

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