Patents by Inventor Shyh J. Pan

Shyh J. Pan 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).

  • Straightedge
    Patent number: 4734993
    Abstract: A transparent straightedge with two L-shaped slots, a multiplicity of vertical and horizontal scales running adjacent to and parallel to the slots, and reference arrows. The L-shaped slots are exactly 90 degrees. Center reference scales in the center portion running vertically. The reference arrows line up with the slots. Opposing scales and center reference scales are all in alignment.
    Type: Grant
    Filed: July 9, 1986
    Date of Patent: April 5, 1988
    Inventor: Shyh J. Pan