Patents by Inventor Harold B. Jeffreys

Harold B. Jeffreys 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).

  • Focused laser doppler velocimeter
    Patent number: 3984686
    Abstract: A system for remotely measuring velocities present in discrete volumes of air in which a CO.sub.2 laser beam is focused by a telescope at such a volume, a focal volume, and within the focusable range, near field, of the telescope. The back scatter, or reflected light, principally from the focal volume, passes back through the telescope and is frequency compared with the original frequency of the laser, and the difference frequency or frequencies represent particle velocities in that focal volume.
    Type: Grant
    Filed: December 3, 1975
    Date of Patent: October 5, 1976
    Inventors: James C. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Fletcher, James W. Bilbro, Werner K. Dahm, Ronald B. Campbell, Jr., Robert M. Huffaker, Harold B. Jeffreys, Albert V. Jelalian, Wayne H. Keene, Michael C. Krause, Thomas R. Lawrence, Charles M. Sonnenschein, David J. Wilson, James A. L. Thomson