Patents by Inventor Robert D. Livingstone

Robert D. Livingstone 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).

  • Fiber optic attenuation simulator
    Patent number: 4281925
    Abstract: A fiber optic line simulator simulates the attenuation in a fiber optic cable with repeatable accuracy by adjusting the air spacing between the ends of two foreshortened fiber optic cables adapted to be connected to a continuity meter or other device for measuring attenuation in a fiber optic cable of extensive length. The simulator may also simulate specific fiber optic lengths for use in evaluation of optical communication systems.
    Type: Grant
    Filed: July 31, 1979
    Date of Patent: August 4, 1981
    Assignee: Bowmar/Ali, Inc.
    Inventors: John W. Forrest, Robert D. Livingstone