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David W. Mitchell

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  • Midland, MI, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Method of making a stand-up plastic bag
    • Patent number 5,080,643
    • Issue date Jan 14, 1992
    • Dow Brands Inc.
    • David W. Mitchell
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Method of making a stand-up plastic bag
    • Patent number 4,997,416
    • Issue date Mar 5, 1991
    • Dow Brands Inc.
    • David W. Mitchell
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL