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Method of making lenses

  • US 3,248,460 A
  • Filed: 02/28/1963
  • Issued: 04/26/1966
  • Est. Priority Date: 02/28/1963
  • Status: Expired due to Term
First Claim
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1. THE METHOD OF FORMING COMPOSITE BIFOCAL LENS OF SUBSTANTIAL POWER COMPRISING, CASTING A BASE LENS OF A PLASTIC MATERIAL HAVING LIMITED CURVATURES ON THE MAJOR SURFACES OF THE LENS TO PRODUCE APPROXIMATELY HALF OF THE PREDETERMINED POWER DESIRED IN THE COMPOSITE LENS, CASTING A LENS PORTION OF ADDITIONAL PLASTIC MATERIAL INTERGRAL

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