Patents by Inventor Hsu Chien-Shih

Hsu Chien-Shih 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).

  • Keyboard membrane keyswitch assembly
    Patent number: 5215187
    Abstract: A keyboard membrane keyswitch assembly comprises a housing, a button, a compression piston and a rubber element. The housing holds the compression piston and the rubber element. The compression piston preferably has a cylindrical shape with a vertical guider along its longitudinal axis. The vertical guider is used to connect the assembly to the button. A supporting ring is linked to the vertical guider by rib elements. The rubber element is adapted to receive the supporting element of the compression piston thereby maximizing the displacement of the button and preventing the button from tilting when it is depressed.
    Type: Grant
    Filed: January 31, 1992
    Date of Patent: June 1, 1993
    Assignee: Acer Incorporated
    Inventors: Liao Ping-Chieng, Hsu Chien-Shih