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John A. Roberts

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  • North Chelmsford, MA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Method of making passage structures
    • Patent number 4,065,046
    • Issue date Dec 27, 1977
    • Brunswick Corporation
    • John A. Roberts
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL