Patents by Inventor Dongnan Du

Dongnan Du 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).

  • Milk frother
    Patent number: D856746
    Type: Grant
    Filed: January 26, 2018
    Date of Patent: August 20, 2019
    Assignee: NINGBO PAILITE ELECTRONICS CO., LTD.
    Inventor: Dongnan Du
  • Milk frother
    Patent number: D867052
    Type: Grant
    Filed: December 23, 2017
    Date of Patent: November 19, 2019
    Assignee: NINGBO PAILITE ELECTRONICS CO., LTD
    Inventor: Dongnan Du
  • Main engine of blender
    Patent number: D907428
    Type: Grant
    Filed: November 7, 2019
    Date of Patent: January 12, 2021
    Inventor: Dongnan Du
  • Pitcher
    Patent number: D925260
    Type: Grant
    Filed: October 31, 2019
    Date of Patent: July 20, 2021
    Inventor: Dongnan Du
  • Whisk
    Patent number: D932826
    Type: Grant
    Filed: June 19, 2020
    Date of Patent: October 12, 2021
    Inventor: Dongnan Du