Patents by Inventor David D. Curtis

David D. Curtis 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 calibration standard apparatus
    Patent number: 5056915
    Abstract: A fiber optic calibration standard apparatus having a fiber optic cable pair which have difference in length of one quarter the wavelength of the applied modulated signal and are coupled to a mirrored reflecting surface to provide reflection reference signals that are utilized to generate error correction signals. A matched termination has one end of an optical fiber sealed in a vial of index matching fluid to absorb the optical power incident to the fiber.
    Type: Grant
    Filed: May 25, 1990
    Date of Patent: October 15, 1991
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: David D. Curtis