Patents by Inventor Huo L. Tsai

Huo L. Tsai 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).

  • Patent number: 4831719
    Abstract: A method for producing keyboards by which the majority of manual labor can be omitted, and which primarily includes the following steps: molding keys from an injection mold in which the arrangements of the cavities thereof are the same as those of a commercial keyboard; moving the molded keys out of the injection mold and socketing the molded keys with a number of corresponding switches of a board by using a taking-out device; and pressing the molded keys tightly together with the corresponding switches so as to form a complete keyboard.
    Type: Grant
    Filed: October 28, 1987
    Date of Patent: May 23, 1989
    Inventor: Huo L. Tsai