Patents by Inventor David S. Swan, Jr.

David S. Swan, Jr. 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 and apparatus for precise calibration of magnetic compass and preparation of deviation tables
    Patent number: 5396709
    Abstract: An apparatus and method for compensating for the measured variation in bearing between magnetic north as read on a compass and true north as may be determined by juxtaposition with the sun at a given time. Such apparatus and method is particularly useful in vessels or other environments in which there are either or both disturbances in the natural magnetic flux pattern of the earth and natural variations between natural magnetic and true north.
    Type: Grant
    Filed: January 5, 1993
    Date of Patent: March 14, 1995
    Inventor: David S. Swan, Jr.