Patents by Inventor Ma Kin Keung

Ma Kin Keung 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).

  • Connector for a sanitizing machine
    Patent number: D944938
    Type: Grant
    Filed: February 26, 2020
    Date of Patent: March 1, 2022
    Assignee: SOCLEAN, INC.
    Inventors: Robert A. Charles, Ma Kin Keung, Chen Jian Hua
  • Connector for a sanitizing machine
    Patent number: D944942
    Type: Grant
    Filed: February 27, 2020
    Date of Patent: March 1, 2022
    Assignee: SOCLEAN, INC.
    Inventors: Robert A. Charles, Ma Kin Keung, Chen Jian Hua
  • Connector for a sanitizing machine
    Patent number: D944943
    Type: Grant
    Filed: February 27, 2020
    Date of Patent: March 1, 2022
    Assignee: SOCLEAN
    Inventors: Robert A. Charles, Ma Kin Keung, Chen Jian Hua
  • Connector for a sanitizing machine
    Patent number: D944944
    Type: Grant
    Filed: February 27, 2020
    Date of Patent: March 1, 2022
    Assignee: SOCLEAN, INC.
    Inventors: Robert A. Charles, Ma Kin Keung, Chen Jian Hua
  • Connector for a sanitizing machine
    Patent number: D944945
    Type: Grant
    Filed: February 27, 2020
    Date of Patent: March 1, 2022
    Assignee: SOCLEAN, INC.
    Inventors: Robert A. Charles, Ma Kin Keung, Chen Jian Hua
  • Connector for a sanitizing machine
    Patent number: D957589
    Type: Grant
    Filed: February 26, 2020
    Date of Patent: July 12, 2022
    Assignee: SOCLEAN, INC.
    Inventors: Robert A. Charles, Ma Kin Keung, Chen Jian Hua