TREA

Paul O'Brien

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  • Long Beach, CA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    End plug adapter
    • Patent number 3,935,782
    • Issue date Feb 3, 1976
    • Barcus-Berry, Inc.
    • Paul J. O'Brien
    • G10 - MUSICAL INSTRUMENTS ACOUSTICS

Patents Applicationslast 30 patents