Patents by Inventor John V. Baxter

John V. Baxter 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).

  • Line current detector
    Patent number: 4158170
    Abstract: A line current detector for use in telecommunications systems to monitor line condition. The detector uses an optical or photo electric device whose input is modulated by line current. A photo transistor, electrically isolated from the line, senses the modulated output of the detector to produce a condition responsive output. The optical device is preferably a liquid crystal device. The output sensor is isolated from the line.
    Type: Grant
    Filed: July 11, 1977
    Date of Patent: June 12, 1979
    Assignee: International Standard Electric Corporation
    Inventors: Henley F. Sterling, Donald A. Weir, Rodger G. George, John V. Baxter