TREA

Kazuo Ichikawa

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Speaker box
    • Patent number D432116
    • Issue date Oct 17, 2000
    • Sony Corporation
    • Kazuo Ichikawa
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Stereo loudspeaker system with tweeters mounted on rotatable enlong...
    • Patent number 5,802,194
    • Issue date Sep 1, 1998
    • Sony Corporation
    • Makoto Yamagishi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Combined amplifier and speakers
    • Patent number D369806
    • Issue date May 14, 1996
    • Sony Corporation
    • Kazuo Ichikawa
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Speaker box
    • Patent number D356568
    • Issue date Mar 21, 1995
    • Sony Corporation
    • Kazuo Ichikawa
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Radio receiver
    • Patent number D352714
    • Issue date Nov 22, 1994
    • Sony Corporation
    • Kazuo Ichikawa
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Television receiver
    • Patent number D344506
    • Issue date Feb 22, 1994
    • Sony Corporation
    • Kazuo Ichikawa
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Earphone
    • Patent number D318865
    • Issue date Aug 6, 1991
    • Sony Corporation
    • Kazuo Ichikawa
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Headphone
    • Patent number D316551
    • Issue date Apr 30, 1991
    • Sony Corporation
    • Kazuo Ichikawa
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Radio receiver
    • Patent number D313020
    • Issue date Dec 18, 1990
    • Sony Corporation
    • Kazuo Ichikawa
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Combined tape player and radio tuner
    • Patent number D308678
    • Issue date Jun 19, 1990
    • Sony Corporation
    • Kazuo Ichikawa
    • D14 - Recording, communication, or information retrieval equipment

Patents Applicationslast 30 patents

  • Information Patent Application

    SPEAKER DEVICE
    • Publication number 20110249832
    • Publication date Oct 13, 2011
    • SONY CORPORATION
    • Nobukazu Suzuki
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE