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Martha Christine Heppard

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  • Greenwood Village, CO, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Artist perspective tool
    • Patent number 11,440,338
    • Issue date Sep 13, 2022
    • Martha Christine Heppard
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Artist perspective tool
    • Patent number 10,850,554
    • Issue date Dec 1, 2020
    • Martha Christine Heppard
    • G01 - MEASURING TESTING

Patents Applicationslast 30 patents

  • Information Patent Application

    ARTIST PERSPECTIVE TOOL
    • Publication number 20210053384
    • Publication date Feb 25, 2021
    • Martha Christine Heppard
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    ARTIST PERSPECTIVE TOOL
    • Publication number 20200180350
    • Publication date Jun 11, 2020
    • Martha Christine Heppard
    • G01 - MEASURING TESTING