Patents by Inventor Runfan Li

Runfan Li 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).

  • Drainage connecting pipe
    Patent number: D816195
    Type: Grant
    Filed: August 16, 2016
    Date of Patent: April 24, 2018
    Assignee: BEIJING RUNDE HONGTU TECHNOLOGY DEVELOPMENT CO. LTD.
    Inventor: Runfan Li
  • Drainage connecting pipe
    Patent number: D816810
    Type: Grant
    Filed: August 16, 2016
    Date of Patent: May 1, 2018
    Assignee: BEIJING RUNDE HONGTU TECHNOLOGY DEVELOPMENT CO. LTD.
    Inventor: Runfan Li