Patents by Inventor Changfeng Cai

Changfeng Cai 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).

  • Bib
    Patent number: D927140
    Type: Grant
    Filed: November 23, 2019
    Date of Patent: August 10, 2021
    Assignee: Wuhan Yubang Adhesive Products Co., Ltd.
    Inventor: Changfeng Cai
  • Retractable gate
    Patent number: D945018
    Type: Grant
    Filed: September 27, 2020
    Date of Patent: March 1, 2022
    Assignee: Wuhan Yubong Adhesive Products Co., Ltd.
    Inventor: Changfeng Cai