Patents by Inventor Dawn E. Schaffer

Dawn E. Schaffer 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).

  • Buried object locating methods and apparatus using multiple electromagnetic signals
    Patent number: 9696447
    Abstract: A method of locating buried objects using a locator having at least one antenna array including three mutually orthogonal antennas each sharing a common center point includes simultaneously determining a plurality of magnetic fields associated with a plurality of different electromagnetic signals and providing a visual indication of the determined magnetic fields on a display of the locator.
    Type: Grant
    Filed: October 14, 2013
    Date of Patent: July 4, 2017
    Assignee: SEESCAN, INC.
    Inventors: Mark S. Olsson, Dawn E. Schaffer, Ray Merewether, Michael J. Martin, David A. Cox