Patents by Inventor Jeff Hsiao

Jeff Hsiao 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: 5363247
    Abstract: A tapered-shaped rotatable frame with at least three filter windows, with at least three filters installed on it, a lens stand which includes a supporting means to rotatably support the frame. The angle between the supporting means and the frame's surface is supplementary to the angle between the supporting means and the frontal surface of the lens.
    Type: Grant
    Filed: January 6, 1993
    Date of Patent: November 8, 1994
    Assignee: Must Systems, Inc.
    Inventors: Hong-Wen Liu, Chih-Hong Hsu, Jeff Hsiao