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Louis M. Crain

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  • Lake Arrowhead, CA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Automated coin grading system
    • Patent number 5,224,176
    • Issue date Jun 29, 1993
    • Professional Coin Grading Service, Inc.
    • Louis M. Crain
    • G06 - COMPUTING CALCULATING COUNTING
  • Information Patent Grant

    Automated coin grading system
    • Patent number 5,220,614
    • Issue date Jun 15, 1993
    • Professional Coin Grading Service, Inc.
    • Louis M. Crain
    • G06 - COMPUTING CALCULATING COUNTING