Patents by Inventor Robert Lawrence Potter

Robert Lawrence Potter 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).

  • Called party fraud prevention in an automated coin system
    Patent number: 4031325
    Abstract: This invention pertains to systems servicing coin operated telephones and, more specifically, to apparatus in such systems for preventing called party fraud in simulating coin deposit signals. During intermediate coin deposit periods, the network connection between the calling and called stations is split into calling and called portions and then these portions are extended and reconnected. A filter is inserted in the extended called station portion to attenuate fraudulent coin deposit signals originating from the called station. A coin tone detector connected to the extended calling station portion is still actuated by valid coin deposit signals from the calling station, but does not detect the attenuated fraudulent signals.
    Type: Grant
    Filed: June 21, 1976
    Date of Patent: June 21, 1977
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Ronald Michael Dudonis, Charles Glenn Morrison, Robert Lawrence Potter, Kenneth Streisand