TREA

John M. Lewis

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  • Crestwood, MO, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Visual acuity test device and method of preparing same
    • Patent number 4,968,131
    • Issue date Nov 6, 1990
    • Stereo Optical Company, Inc.
    • John M. Lewis
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Grant

    Visual acuity testing
    • Patent number 4,854,695
    • Issue date Aug 8, 1989
    • Stereo Optical Company, Inc.
    • John M. Lewis
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE