Patents by Inventor Ronald S. Selman

Ronald S. Selman 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).

  • Closed loop magnet control for magnetic recording head testing apparatus
    Patent number: 7550967
    Abstract: A magnetic recording head tester uses closed loop control to accurately control the magnetic field that is generated to test the magnetic recording head. The closed loop control compares the value of the sensed magnetic field to the desired value of the magnetic field and adjusts the magnetic field accordingly. A magnetic field sensor used in the tester may be located in a position that has a substantially different magnetic field magnitude than is experienced by the magnetic recording head. The value of the output signal from the magnetic field sensor is correlated to the magnitude of the magnetic field at the location of the magnetic recording head through calibration. The correlation can then be used to accurately produce the desired magnitude magnetic field at the location of the magnetic recording head.
    Type: Grant
    Filed: May 11, 2007
    Date of Patent: June 23, 2009
    Assignee: Infinitum Solutions, Inc.
    Inventors: Henry Patland, Wade A. Ogle, Oleg Shurygin, Ronald S. Selman