Patents by Inventor Felix W. H. Yeh

Felix W. H. Yeh 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).

  • Apparatus for controlling an electric elevator
    Patent number: 5004076
    Abstract: A controlling apparatus is provided to control an electric elevator in a more efficient manner.
    Type: Grant
    Filed: April 18, 1989
    Date of Patent: April 2, 1991
    Inventors: Hai C. Chen, Felix W. H. Yeh