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Kejia Liu

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  • Shenzhen, CN
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Patents Grantslast 30 patents

  • Information Patent Grant

    Method and apparatus for eliminating sound leakage
    • Patent number 12,154,538
    • Issue date Nov 26, 2024
    • AAC Acoustic Technologies (Shenzhen) Co., Ltd.
    • Kejia Liu
    • G10 - MUSICAL INSTRUMENTS ACOUSTICS
  • Information Patent Grant

    Speaker
    • Patent number 12,003,938
    • Issue date Jun 4, 2024
    • AAC Microtech (Changzhou) Co., Ltd.
    • Kejia Liu
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Acoustic device
    • Patent number 11,950,071
    • Issue date Apr 2, 2024
    • AAC Microtech (Changzhou) Co., Ltd.
    • Weimin Chen
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Acoustic device
    • Patent number 11,943,596
    • Issue date Mar 26, 2024
    • AAC Microtech (Changzhou) Co., Ltd.
    • Weimin Chen
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Linear vibration motor with elastic member and flexible PCB fixed o...
    • Patent number 11,750,074
    • Issue date Sep 5, 2023
    • AAC Microtech (Changzhou) Co., Ltd.
    • Jie Ma
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Linear motor
    • Patent number 11,697,133
    • Issue date Jul 11, 2023
    • AAC Microtech (Changzhou) Co., Ltd.
    • Kejia Liu
    • B06 - GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
  • Information Patent Grant

    Linear vibration motor with elastic members with brackets, foams an...
    • Patent number 11,641,151
    • Issue date May 2, 2023
    • AAC Microtech (Changzhou) Co., Ltd.
    • Jie Ma
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Motor and driving device using same
    • Patent number 11,404,987
    • Issue date Aug 2, 2022
    • AAC Technologies Pte. Ltd.
    • Yao Wang
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Speaker box
    • Patent number 10,932,033
    • Issue date Feb 23, 2021
    • AAC Technologies Pte. Ltd.
    • Rongrong Wu
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

  • Information Patent Application

    SMART DEVICE FOR REDUCING SOUND LEAKAGE, METHOD, AND SYSTEM, AND CO...
    • Publication number 20240414472
    • Publication date Dec 12, 2024
    • AAC TECHNOLOGIES (NANJING) CO., LTD.
    • Kejia Liu
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    COAXIAL SPEAKER TWEETER TEMPERATURE PROTECTION METHOD AND SYSTEM, A...
    • Publication number 20240340582
    • Publication date Oct 10, 2024
    • AAC TECHNOLOGIES (NANJING) CO., LTD.
    • Yuheng Jiang
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Application

    COAXIAL SPEAKER PROTECTION METHOD, COAXIAL SPEAKER PROTECTION SYSTE...
    • Publication number 20240340590
    • Publication date Oct 10, 2024
    • AAC TECHNOLOGIES (NANJING) CO., LTD.
    • Yuheng Jiang
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    COAXIAL SPEAKER PROTECTION METHOD, COAXIAL SPEAKER PROTECTION SYSTE...
    • Publication number 20240340584
    • Publication date Oct 10, 2024
    • AAC TECHNOLOGIES (NANJING) CO., LTD.
    • Yuheng Jiang
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    COAXIAL SPEAKER PROTECTION METHOD, COAXIAL SPEAKER PROTECTION SYSTE...
    • Publication number 20240340579
    • Publication date Oct 10, 2024
    • AAC TECHNOLOGIES (NANJING) CO., LTD.
    • Yuheng Jiang
    • G06 - COMPUTING CALCULATING COUNTING
  • Information Patent Application

    TRANSDUCER PROTECTION SYSTEM AND METHOD
    • Publication number 20240340583
    • Publication date Oct 10, 2024
    • AAC TECHNOLOGIES (NANJING) CO., LTD.
    • Ruizhi Lan
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Application

    METHOD AND APPARATUS FOR ELIMINATING SOUND LEAKAGE
    • Publication number 20240087555
    • Publication date Mar 14, 2024
    • AAC ACOUSTIC TECHNOLOGIES (SHENZHEN) CO., LTD
    • Kejia Liu
    • G10 - MUSICAL INSTRUMENTS ACOUSTICS
  • Information Patent Application

    METHOD AND APPARATUS FOR EMILINATING SOUND LEAKAGE
    • Publication number 20240089654
    • Publication date Mar 14, 2024
    • AAC ACOUSTIC TECHNOLOGIES (SHENZHEN) CO., LTD
    • Yuheng Jiang
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Acoustic Device
    • Publication number 20230199397
    • Publication date Jun 22, 2023
    • AAC Microtech (Changzhou) Co., Ltd.
    • Weimin Chen
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    Acoustic Device
    • Publication number 20230199393
    • Publication date Jun 22, 2023
    • AAC Microtech (Changzhou) Co., Ltd.
    • Weimin Chen
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    SPEAKER
    • Publication number 20230199396
    • Publication date Jun 22, 2023
    • AAC Microtech (Changzhou) Co., Ltd.
    • Kejia Liu
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    LINEAR VIBRATION MOTOR
    • Publication number 20220368206
    • Publication date Nov 17, 2022
    • AAC Microtech (Changzhou) Co., Ltd.
    • Jie Ma
    • B06 - GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
  • Information Patent Application

    LINEAR VIBRATION MOTOR
    • Publication number 20220368205
    • Publication date Nov 17, 2022
    • AAC Microtech (Changzhou) Co., Ltd.
    • Jie Ma
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    MULTI-SOLENOID LINEAR VIBRATION MOTOR
    • Publication number 20220278599
    • Publication date Sep 1, 2022
    • AAC Microtech (Changzhou) Co., Ltd.
    • Zhiyong Cui
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    LINEAR MOTOR
    • Publication number 20220203401
    • Publication date Jun 30, 2022
    • AAC Microtech (Changzhou) Co., Ltd.
    • Kejia Liu
    • B06 - GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
  • Information Patent Application

    Linear Vibration Motor
    • Publication number 20220200427
    • Publication date Jun 23, 2022
    • AAC Microtech (Changzhou) Co., Ltd.
    • Jie Ma
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    LINEAR MOTOR
    • Publication number 20220200430
    • Publication date Jun 23, 2022
    • AAC Microtech (Changzhou) Co., Ltd.
    • Zhiyong Cui
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    VIBRATION MOTOR
    • Publication number 20210057976
    • Publication date Feb 25, 2021
    • AAC Technologies Pte. Ltd.
    • Kejia Liu
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    Motor and Driving Device Using Same
    • Publication number 20200412290
    • Publication date Dec 31, 2020
    • AAC Technologies Pte. Ltd.
    • Yao Wang
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    TOUCH PANEL
    • Publication number 20200050277
    • Publication date Feb 13, 2020
    • AAC Technologies Pte. Ltd.
    • Yao Wang
    • G06 - COMPUTING CALCULATING COUNTING
  • Information Patent Application

    SPEAKER BOX
    • Publication number 20200045415
    • Publication date Feb 6, 2020
    • AAC Technologies Pte. Ltd.
    • Rongrong Wu
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    VOICE COIL AND SPEAKER
    • Publication number 20200045452
    • Publication date Feb 6, 2020
    • AAC ACOUSTIC TECHNOLOGIES (SHENZHEN) CO., LTD
    • Kejia Liu
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    SOUND DEVICE
    • Publication number 20200045412
    • Publication date Feb 6, 2020
    • AAC ACOUSTIC TECHNOLOGIES (SHENZHEN) CO., LTD
    • Rongrong Wu
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE