TREA

Ralph W. Allen Jr.

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  • Melrose, MA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Sound attenuation material
    • Patent number 4,056,161
    • Issue date Nov 1, 1977
    • Tillotson Corporation
    • Ralph W. Allen
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL