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Koji Okazaki

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Patents Grantslast 30 patents

  • Information Patent Grant

    Speaker diaphragm and coil coupling arrangement, and method
    • Patent number 10,681,468
    • Issue date Jun 9, 2020
    • Yamaha Corporation
    • Koji Okazaki
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Acoustic apparatus
    • Patent number 9,473,847
    • Issue date Oct 18, 2016
    • Yamaha Corporation
    • Yasuo Shiozawa
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Speaker
    • Patent number 8,820,471
    • Issue date Sep 2, 2014
    • Yamaha Corporation
    • Yasuo Shiozawa
    • G10 - MUSICAL INSTRUMENTS ACOUSTICS

Patents Applicationslast 30 patents

  • Information Patent Application

    SPEAKER DIAPHRAGM AND COIL COUPLING ARRAGEMENT, AND METHOD
    • Publication number 20190037318
    • Publication date Jan 31, 2019
    • Yamaha Corporation
    • Koji OKAZAKI
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Acoustic Apparatus
    • Publication number 20140254839
    • Publication date Sep 11, 2014
    • Yamaha Corporation
    • Yasuo SHIOZAWA
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Speaker
    • Publication number 20130146389
    • Publication date Jun 13, 2013
    • Yamaha Corporation
    • Yasuo SHIOZAWA
    • G10 - MUSICAL INSTRUMENTS ACOUSTICS