Patents by Inventor Marcus James Johnson

Marcus James Johnson 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 forming coil for use in eddy current sensing probe
    Patent number: 7795863
    Abstract: A coil for use in an eddy current sensing probe is formed through depositing film traces. The film traces can be directly deposited. The film traces can be deposited on the outer surface of a core or on ends of the core. The film traces can be deposited onto non-planar surfaces other than cores for the inspection of parts having complex geometries. The coil can be used in a single coil probe or in a probe having a sensor array.
    Type: Grant
    Filed: February 23, 2005
    Date of Patent: September 14, 2010
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Marcus James Johnson, Norio Nakagawa