Patents by Inventor Qingshan Du

Qingshan 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).

  • Toy
    Patent number: D923117
    Type: Grant
    Filed: January 3, 2020
    Date of Patent: June 22, 2021
    Inventor: Qingshan Du
  • Toy
    Patent number: D954849
    Type: Grant
    Filed: January 3, 2020
    Date of Patent: June 14, 2022
    Inventor: Qingshan Du
  • Toy
    Patent number: D954850
    Type: Grant
    Filed: January 6, 2020
    Date of Patent: June 14, 2022
    Inventor: Qingshan Du
  • Ball toy
    Patent number: D964492
    Type: Grant
    Filed: January 3, 2020
    Date of Patent: September 20, 2022
    Inventor: Qingshan Du
  • Ring toss toy set
    Patent number: D967268
    Type: Grant
    Filed: April 17, 2020
    Date of Patent: October 18, 2022
    Assignee: Shantou Wei Zhi Kang Toys Company
    Inventor: Qingshan Du
  • Bus toy
    Patent number: D977032
    Type: Grant
    Filed: April 21, 2020
    Date of Patent: January 31, 2023
    Assignee: Shantou Wei Zhi Kang Toys Company
    Inventor: Qingshan Du
  • Toy
    Patent number: D1006906
    Type: Grant
    Filed: January 20, 2020
    Date of Patent: December 5, 2023
    Inventor: Qingshan Du