Patents by Inventor Ruiyin Cao

Ruiyin Cao 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).

  • Safety helmet
    Patent number: D971508
    Type: Grant
    Filed: July 13, 2022
    Date of Patent: November 29, 2022
    Inventor: Ruiyin Cao
  • Safety hard hat
    Patent number: D982835
    Type: Grant
    Filed: October 11, 2021
    Date of Patent: April 4, 2023
    Assignee: ZHEJIANG HIGHVIZ SAFETY SUPPLIES CO., LTD.
    Inventor: Ruiyin Cao