Patents by Inventor Zoey Liu

Zoey Liu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Filter circuit for noise cancellation earphones
    Patent number: 9941860
    Abstract: The invention is a filter circuit for noise cancelling earphones wherein one end of the filter circuit for noise cancelling earphones is connected to the circuit for noise cancelling microphones. In the circuit starting from one end of the said noise cancelling microphones circuit connected to the resistor R0 set the first current node. The other end of the said noise cancelling microphones circuit is connected to the ground while the other end of the said resistor R0 is connected to the high level.
    Type: Grant
    Filed: November 3, 2016
    Date of Patent: April 10, 2018
    Assignee: Shenzhen Shengyuan Tech Ltd.
    Inventor: Zoey Liu
  • Active noise cancelling wireless earphone
    Patent number: D822636
    Type: Grant
    Filed: January 4, 2017
    Date of Patent: July 10, 2018
    Assignee: Shenzhen Shangyuan Tech LTD
    Inventor: Zoey Liu