Patents by Inventor Naoyuki Sumina

Naoyuki Sumina 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).

  • Blade of a shovel
    Patent number: D920752
    Type: Grant
    Filed: July 10, 2019
    Date of Patent: June 1, 2021
    Inventor: Naoyuki Sumina
  • Blade of a shovel
    Patent number: D934641
    Type: Grant
    Filed: January 7, 2020
    Date of Patent: November 2, 2021
    Inventor: Naoyuki Sumina
  • Hand cart
    Patent number: D970141
    Type: Grant
    Filed: September 25, 2020
    Date of Patent: November 15, 2022
    Inventor: Naoyuki Sumina
  • Hand cart
    Patent number: D981071
    Type: Grant
    Filed: May 17, 2021
    Date of Patent: March 14, 2023
    Inventor: Naoyuki Sumina
  • Hand cart
    Patent number: D986525
    Type: Grant
    Filed: November 15, 2021
    Date of Patent: May 16, 2023
    Inventor: Naoyuki Sumina
  • Hand cart
    Patent number: D997485
    Type: Grant
    Filed: December 20, 2022
    Date of Patent: August 29, 2023
    Inventor: Naoyuki Sumina