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Paul T. Ihn

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  • North Hudson, WI, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Multifocal diffractive ophthalmic lens and method of manufacture
    • Patent number 5,152,788
    • Issue date Oct 6, 1992
    • Minnesota Mining and Manufacturing Company
    • William B. Isaacson
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Lens molding apparatus and method
    • Patent number 4,865,779
    • Issue date Sep 12, 1989
    • Minnesota Mining and Manufacturing Company
    • Paul T. Ihn
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL