Patents by Inventor David J. Land

David J. Land 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 of measuring the thermal conductivity of microscopic graphite fibers
    Patent number: 5586824
    Abstract: A metal or graphite fiber is suspended in a working fluid having a high refractive index change with the temperature and a modulated laser beam heats the fiber producing a synchronous thermal wave in the fiber whose amplitude and phase are measured by passing a probe laser beam through the liquid close to the fiber and converting the probe beam deflections into an electric signal. A theoretical model of the thermal wave is used to calculate the amplitude and phase shift of a theoretical thermal wave for points along the fiber from physical characteristics of the lasers and the fiber including an estimate of the thermal conductivity of the fiber.
    Type: Grant
    Filed: June 14, 1994
    Date of Patent: December 24, 1996
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: John Barkyoumb, Lawrence T. Kabacoff, David J. Land