Patents by Inventor Beijun Liu

Beijun 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).

  • Earphone
    Patent number: D946551
    Type: Grant
    Filed: July 1, 2020
    Date of Patent: March 22, 2022
    Assignee: ZhongTian DingSheng (Shenzhen) Industry Co., Ltd.
    Inventor: Beijun Liu
  • Earphone
    Patent number: D953290
    Type: Grant
    Filed: July 4, 2020
    Date of Patent: May 31, 2022
    Assignee: ZhongTian DingSheng (Shenzhen) Industry Co., Ltd
    Inventor: Beijun Liu
  • Earphone
    Patent number: D1050074
    Type: Grant
    Filed: January 19, 2023
    Date of Patent: November 5, 2024
    Assignee: ZhongTian DingSheng (Shenzhen) Industry
    Inventor: Beijun Liu