Patents by Inventor Thomas Virgil Lathrop

Thomas Virgil Lathrop 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).

  • Method and apparatus for detecting faults in buried insulated conductors
    Patent number: 3991363
    Abstract: An electrical leakage path fault in the insulation of a buried conductor is located by first applying a composite signal comprising a test signal and a carrier signal modulated by the test signal between the conductor and earth. The two components of the composite signal are then sensed at locations along the path of the conductor. The sensed carrier signal is used by itself while its modulation content is used with the sensed test signal to trace the conductor to the fault.
    Type: Grant
    Filed: August 11, 1975
    Date of Patent: November 9, 1976
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: Thomas Virgil Lathrop