Patents by Inventor W. Patrick Henry

W. Patrick Henry 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 magnetic identification and localization of flaws in conductors by canceling the field about the conductor with the field about a flawless conductor
    Patent number: 5109196
    Abstract: Flaws in an electrically conductive sample object are detected by cancelling the magnetic field generated by a detection current passed through the sample object by passing the current back through an unflawed field cancelling object placed next to the sample object, and measuring the uncancelled field produced by any flaw, preferably with a superconducting quantum interference device (SQUID) magnetometer. Elongated objects such as tubes and rods are fed through a sleeve which forms the field cancelling object, with the current applied to the elongated member and passed to the field cancelling sleeve through sliding contacts.
    Type: Grant
    Filed: March 5, 1991
    Date of Patent: April 28, 1992
    Assignee: Vanderbilt University
    Inventors: John P. Wikswo, Jr., Nestor G. Sepulveda, W. Patrick Henry, Duane Crum