Patents by Inventor Chengqian Ao

Chengqian Ao 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).

  • Air purifier
    Patent number: D870255
    Type: Grant
    Filed: August 11, 2017
    Date of Patent: December 17, 2019
    Assignee: SHENZHEN XILUO TECHNOLOGY CO., LTD.
    Inventor: Chengqian Ao
  • Air purifier
    Patent number: D952825
    Type: Grant
    Filed: December 15, 2020
    Date of Patent: May 24, 2022
    Inventor: Chengqian Ao
  • Air purifier
    Patent number: D959631
    Type: Grant
    Filed: November 2, 2020
    Date of Patent: August 2, 2022
    Inventor: Chengqian Ao