TREA

Parsons; James D.

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  • Littleton, CO, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Acoustic horn
    • Patent number D291663
    • Issue date Sep 1, 1987
    • Parsons; James D.
    • James D. Parsons
    • D10 - Measuring, testing, or signalling instruments