Patents by Inventor Yunjin Zhao

Yunjin Zhao 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).

  • Attachment for a floor cleaning machine
    Patent number: D815381
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: April 10, 2018
    Assignee: Alfred Kaercher GmbH & Co. KG
    Inventors: Denis Dammkoehler, Zheyi Jin, Yunjin Zhao
  • Spray gun for a cleaning machine
    Patent number: D889597
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: July 7, 2020
    Assignee: Alfred Kaercher SE & Co. KG
    Inventors: Denis Dammkoehler, Yunjin Zhao
  • Cleaning machine
    Patent number: D919207
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: May 11, 2021
    Assignee: Alfred Kaercher SE & Co. KG
    Inventors: Denis Dammkoehler, Yunjin Zhao