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Ryoichi HAMANAKA

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Audiometer
    • Patent number 10,888,253
    • Issue date Jan 12, 2021
    • Rion Co., Ltd.
    • Ryoichi Hamanaka
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Grant

    Earphone for audiometer, and audiometer
    • Patent number 10,390,126
    • Issue date Aug 20, 2019
    • Rion Co., Ltd.
    • Shinichi Ishikawa
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE

Patents Applicationslast 30 patents

  • Information Patent Application

    AUDIOMETER
    • Publication number 20190209053
    • Publication date Jul 11, 2019
    • Rion Co., Ltd.
    • Ryoichi HAMANAKA
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    EARPHONE FOR AUDIOMETER, AND AUDIOMETER
    • Publication number 20190116413
    • Publication date Apr 18, 2019
    • Rion Co., Ltd.
    • Shinichi ISHIKAWA
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE