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Charles M. Willwerth

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  • Newburyport, MA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Bias stretching apparatus for imitation-leather
    • Patent number 4,233,012
    • Issue date Nov 11, 1980
    • Compo Industries, Inc.
    • Charles M. Willwerth
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Imitation-leather, bias-stretching process
    • Patent number 4,140,827
    • Issue date Feb 20, 1979
    • Compo Industries Inc.
    • Charles M. Willwerth
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL