Patents by Inventor Michael C. Rankin

Michael C. Rankin 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).

  • Memory and apparatus for a thermally accelerated reliability testing
    Patent number: 5278495
    Abstract: A method for rapidly changing temperatures of either an unpopulated printed circuit board or a completed printed circuit board assembly and testing operation thereof. The rapid temperature change nondestructively stresses the printed circuit board or assembly and uncovers many defects that are hard to discover by constant temperature test methods. Each unit under test is alternately bathed with cold perfluorinated liquid and hot perflourinated liquid to rapidly change it temperature from cold (273 degrees kelvin) to hot (333 degrees kelvin).
    Type: Grant
    Filed: June 29, 1993
    Date of Patent: January 11, 1994
    Assignee: NCR Corporation
    Inventors: Bradford P. Beaton, Michael C. Rankin, Frederick D. Brumble