TREA

Oswald Bergman

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  • Freeland, MI, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Heat sealing apparatus and method
    • Patent number 4,419,167
    • Issue date Dec 6, 1983
    • The Dow Chemical Company
    • Robert A. Hay
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Extruded plastic foam shaping apparatus
    • Patent number 4,292,019
    • Issue date Sep 29, 1981
    • The Dow Chemical Company
    • Robert A. Hay
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL