Patents by Inventor Demu Chen

Demu Chen 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).

  • Helical worm gear motor
    Patent number: D855022
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: July 30, 2019
    Inventors: Demu Chen, Zhiming Tong, Guangpei Fu
  • Helical-bevel gear motor
    Patent number: D856279
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: August 13, 2019
    Inventors: Demu Chen, Zhiming Tong, Guangpei Fu
  • Helical gear motor
    Patent number: D857628
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: August 27, 2019
    Inventors: Demu Chen, Zhiming Tong, Guangpei Fu