TREA

David M. Gresham

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  • Chicago, IL, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Stereoscopic viewer
    • Patent number D305667
    • Issue date Jan 23, 1990
    • View-Master Ideal Group, Inc.
    • Martin Thaler
    • D16 - Photography and optical equipment
  • Information Patent Grant

    Stereoscopic viewer
    • Patent number 4,726,653
    • Issue date Feb 23, 1988
    • View-Master Ideal Group, Inc.
    • Martin Thaler
    • G02 - OPTICS