Patents by Inventor Liao Ching-Shui

Liao Ching-Shui 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).

  • Key unit of a keyboard
    Patent number: 5456541
    Abstract: An improved key unit of a keyboard comprising a key top, a keyboard plate and a conductive film; the conductive film being mounted beneath the keyboard plate; the keyboard plate has a mounting base comprising a hollow cylinder mounted thereon and the key top being mounted on the mounting base through the hollow cylinder.
    Type: Grant
    Filed: March 23, 1994
    Date of Patent: October 10, 1995
    Inventor: Liao Ching-Shui