TREA

Masao Fujihira

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  • Kanagawa, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Speaker
    • Patent number 6,587,571
    • Issue date Jul 1, 2003
    • Sony Corporation
    • Masao Fujihira
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Speaker
    • Patent number 6,542,617
    • Issue date Apr 1, 2003
    • Sony Corporation
    • Masao Fujihira
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Electro-acoustic transducer
    • Patent number 6,356,643
    • Issue date Mar 12, 2002
    • Sony Corporation
    • Makoto Yamagishi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Acoustic transducer
    • Patent number 6,175,637
    • Issue date Jan 16, 2001
    • Sony Corporation
    • Masao Fujihira
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Speaker apparatus and sound reproduction system employing same
    • Patent number 6,160,894
    • Issue date Dec 12, 2000
    • Sony Corporation
    • Jun Kishigami
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Acoustic transducer
    • Patent number 6,035,052
    • Issue date Mar 7, 2000
    • Sony Corporation
    • Masao Fujihira
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Speaker apparatus
    • Patent number 5,909,496
    • Issue date Jun 1, 1999
    • Sony Corporation
    • Jun Kishigami
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Speaker apparatus
    • Patent number 5,862,237
    • Issue date Jan 19, 1999
    • Sony Corporation
    • Jun Kishigami
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Speaker apparatus
    • Patent number 5,835,612
    • Issue date Nov 10, 1998
    • Sony Corporation
    • Masao Fujihira
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Transducer having two ducts
    • Patent number 5,115,473
    • Issue date May 19, 1992
    • Sony Corporation
    • Makoto Yamagishi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE