Patents by Inventor Robert A. Shilling

Robert A. Shilling 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).

  • Picture puzzle assembly
    Patent number: 5158295
    Abstract: A picture puzzle of the "jigsaw" type has a magnetic backing on each piece used to adhere the assembled puzzle to a ferrous backing plate which may be framed and wall-hung. The puzzle is free to be reused.
    Type: Grant
    Filed: May 21, 1991
    Date of Patent: October 27, 1992
    Inventor: Robert A. Shilling
  • Vehicle theft-prevention system
    Patent number: 4063610
    Abstract: A vehicle theft-prevention system having a concealed switch operable to disable the ignition system of an internal combustion engine. The concealed switch is of the single pole, double throw variety having one terminal grounded and the other terminal connected to a wire which taps the wire connecting the ignition switch to the coil primary. When the concealed switch is closed, current flowing from the ignition switch is shunted to ground without flowing through the coil thereby rendering the internal combustion engine inoperable.
    Type: Grant
    Filed: March 22, 1976
    Date of Patent: December 20, 1977
    Inventor: Robert A. Shilling