Patents by Inventor Anna Mathai

Anna Mathai 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 imaging microscopic spatial variations in small currents and magnetic fields
    Patent number: 5491411
    Abstract: A magnetic flux microscope that measures the magnetic field about a sample surface. The apparatus uses a thin-film superconducting quantum interference device (SQUID) as the scanning device. Magnetic shielding is provided about the SQUID and is held stationary relative to the SQUID. The apparatus and method provides a very high magnetic image of the sample with a very high spatial and field resolution.
    Type: Grant
    Filed: May 14, 1993
    Date of Patent: February 13, 1996
    Assignee: University of Maryland
    Inventors: Frederick C. Wellstood, Anna Mathai, Dian Song, Randall C. Black