Patents by Inventor Paul Francis Petric

Paul Francis Petric 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).

  • Simultaneous deflections in charged-particle beams
    Patent number: 5650628
    Abstract: A charged particle beam is controlled by two pairs of deflectors that adjust the beam through two or more deflection centers, thereby saving cost and space and reducing system noise. The mathematics of the superposition of signals and, therefore, of the deflecting fields provide orthogonality of the adjustments so that all adjustments are independent of each other.
    Type: Grant
    Filed: December 15, 1994
    Date of Patent: July 22, 1997
    Assignee: International Business Machines Corporation
    Inventors: Michael Stuart Gordon, Donald F. Haire, Paul Francis Petric, James Donald Rockrohr