Patents by Inventor Kwok H. Liu

Kwok H. Liu 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).

  • Fluorescent lantern
    Patent number: D290516
    Type: Grant
    Filed: October 17, 1984
    Date of Patent: June 23, 1987
    Assignee: Transistolite Manufacturing Limited
    Inventor: Kwok H. Liu
  • Rechargeable flashlight
    Patent number: D292321
    Type: Grant
    Filed: November 13, 1984
    Date of Patent: October 13, 1987
    Assignee: Transistolite Manufacturing Limited
    Inventor: Kwok H. Liu
  • Shaver
    Patent number: D297375
    Type: Grant
    Filed: June 13, 1986
    Date of Patent: August 23, 1988
    Assignee: Transistolite Manufacturing Limited
    Inventor: Kwok H. Liu
  • Flashlight
    Patent number: D312884
    Type: Grant
    Filed: September 10, 1987
    Date of Patent: December 11, 1990
    Assignee: Transistolite Manufacturing Limited
    Inventor: Kwok H. Liu