TREA

William O. Doering

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  • Stillwater, OK, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Ultra low frequency transducer and loud speaker comprising same
    • Patent number 7,916,890
    • Issue date Mar 29, 2011
    • Stillwater Designs & Audio, Inc.
    • Steven M. Irby
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Ultra low frequency transducer and loud speaker comprising same
    • Patent number 6,611,604
    • Issue date Aug 26, 2003
    • Stillwater Designs & Audio, Inc.
    • Steven M. Irby
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Subwoofer surround and diaphragm assembly
    • Patent number D473216
    • Issue date Apr 15, 2003
    • Stillwater Designs & Audio, Inc.
    • Steven M. Irby
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Subwoofer basket
    • Patent number D456386
    • Issue date Apr 30, 2002
    • Stillwater Designs & Audio, Inc.
    • Steven M. Irby
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Speaker grill
    • Patent number D449293
    • Issue date Oct 16, 2001
    • Stillwater Designs & Audio, Inc.
    • Steven M. Irby
    • D14 - Recording, communication, or information retrieval equipment

Patents Applicationslast 30 patents