Patents by Inventor Raymond A. Laperle

Raymond A. Laperle 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).

  • Ground isolated electrostatic field detector
    Patent number: 4349783
    Abstract: An instrument for locating the position of hidden live continuous or broken wires utilizes an indicator such as a series of light emitting diodes to indicate the adjacency or the strength of the electrostatic field surrounding the wire. By watching the number of light emitting diodes lit, the instrument can be brought directly to the wire. The instrument is comprised of an antenna connected to the high input impedance of an amplifier, a low pass filter connected to the output of the amplifier, a lamp operation circuit and an indication means connected to the lamp operation circuit.
    Type: Grant
    Filed: May 17, 1978
    Date of Patent: September 14, 1982
    Inventors: William F. Robson, Raymond A. Laperle