Patents by Inventor Changjiang Si

Changjiang Si 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).

  • Toilet brush
    Patent number: D988009
    Type: Grant
    Filed: May 21, 2021
    Date of Patent: June 6, 2023
    Assignee: Yiwu Xiangjia Technology Co., Ltd.
    Inventors: Shanshan Wu, Zijian Chen, Changjiang Si
  • Toilet brush
    Patent number: D1013411
    Type: Grant
    Filed: May 21, 2021
    Date of Patent: February 6, 2024
    Assignee: Yiwu Xiangjia Technology Co., Ltd.
    Inventors: Shanshan Wu, Zijian Chen, Changjiang Si
  • Combined toilet brush and holder
    Patent number: D1025619
    Type: Grant
    Filed: January 25, 2022
    Date of Patent: May 7, 2024
    Assignee: Shanghai Xiangjia Technology Co., Ltd.
    Inventors: Shanshan Wu, Zijian Chen, Changjiang Si