Patents by Inventor Laurance Chen

Laurance Chen 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).

  • Slate positioning device
    Patent number: 5619834
    Abstract: A slate positioning device comprises a positioning plate. The positioning plate has a horizontal plate and the first and the second longitudinal plates at two ends of the horizontal plate. The first longitudinal plate has a hole. The second longitudinal plate has an upper convex edge and a lower convex edge. A pad plate has a slot and a concave surface to cover the first longitudinal plate. The upper convex edge and the lower convex edge are inserted in the corresponding grooves of the corresponding slates. A screw rod passes through the hole and the slot to fasten the first longitudinal plate and the pad plate.
    Type: Grant
    Filed: December 5, 1995
    Date of Patent: April 15, 1997
    Inventor: Laurance Chen