TREA

Tomoya Takahashi

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  • Taichung City, TW
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Patents Grantslast 30 patents

  • Information Patent Grant

    Headphone device
    • Patent number 11,800,272
    • Issue date Oct 24, 2023
    • Sintai Optical (Shenzhen) Co., Ltd.
    • Takayuki Karasawa
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Earpiece device
    • Patent number 11,735,154
    • Issue date Aug 22, 2023
    • Sintai Optical (Shenzhen) Co., Ltd.
    • Takayuki Karasawa
    • G10 - MUSICAL INSTRUMENTS ACOUSTICS
  • Information Patent Grant

    Headphone
    • Patent number D912643
    • Issue date Mar 9, 2021
    • Sintai Optical (Shenzhen) Co., Ltd.
    • Yasuhiko Nakayama
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Headphone
    • Patent number 10,165,344
    • Issue date Dec 25, 2018
    • Sintai Optical (Shenzhen) Co., Ltd.
    • Naofumi Imai
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Headphone
    • Patent number 10,165,351
    • Issue date Dec 25, 2018
    • Sintai Optical (Shenzhen) Co., Ltd.
    • Naofumi Imai
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Headphone device
    • Patent number 10,080,076
    • Issue date Sep 18, 2018
    • Sintai Optical (Shenzhen) Co., Ltd.
    • Takayuki Karasawa
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

  • Information Patent Application

    Earpiece Device
    • Publication number 20220270585
    • Publication date Aug 25, 2022
    • SINTAI OPTICAL (SHENZHEN) CO., LTD.
    • Takayuki Karasawa
    • G10 - MUSICAL INSTRUMENTS ACOUSTICS
  • Information Patent Application

    Headphone Device
    • Publication number 20220256269
    • Publication date Aug 11, 2022
    • SINTAI OPTICAL (SHENZHEN) CO., LTD.
    • Takayuki Karasawa
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    HEADPHONE DEVICE
    • Publication number 20170366893
    • Publication date Dec 21, 2017
    • SINTAI OPTICAL (SHENZHEN) CO., LTD.
    • Takayuki Karasawa
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    HEADPHONE
    • Publication number 20170214993
    • Publication date Jul 27, 2017
    • SINTAI OPTICAL (SHENZHEN) CO., LTD.
    • Naofumi Imai
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    HEADPHONE
    • Publication number 20170214999
    • Publication date Jul 27, 2017
    • SINTAI OPTICAL (SHENZHEN) CO., LTD.
    • Naofumi Imai
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE