TREA

Frank M. Hoofnagle

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  • Houma, LA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Pneumatic relay
    • Patent number 3,963,050
    • Issue date Jun 15, 1976
    • B.W.B. Controls, Inc.
    • Gerald F. Theriot
    • E21 - EARTH DRILLING MINING