Patents by Inventor Phillip J. Coane

Phillip J. Coane 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).

  • Electron beam potential switching apparatus
    Patent number: 4426583
    Abstract: The electron potential of an electron beam is switched between different values without moving the focal plane by effectively changing the axial position of the electron source at the same time that the electron potential is changed. The effective change in axial position of the electron source exactly compensates for the altered effectiveness which magnetic lenses have upon an electron beam of altered electron potential such that the final focal plane remains at the same position without adjusting the field strength of any magnetic lens.
    Type: Grant
    Filed: May 10, 1982
    Date of Patent: January 17, 1984
    Assignee: International Business Machines Corporation
    Inventors: Tai-Hon P. Chang, Phillip J. Coane, Fritz-Jurgen Hohn, Dieter P. Kern