Patents by Inventor Stephen Duncan Ferris

Stephen Duncan Ferris 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 source of a single crystal of lanthanum hexaboride emitting surface of (110) crystal plane
    Patent number: 4054946
    Abstract: An electron source using a single lanthanum hexaboride crystal oriented so the emitting surface is defined by a {110} crystal plane.
    Type: Grant
    Filed: September 28, 1976
    Date of Patent: October 18, 1977
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Stephen Duncan Ferris, David Charles Joy, Harry John Leamy, Louis David Longinotti, Paul Herman Schmidt