Patents by Inventor Charles R. Kalbfus

Charles R. Kalbfus 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).

  • Dual filament ion source
    Patent number: 4412153
    Abstract: An electron bombardment ion source of the Freeman type incorporates an electrode having multiple segments which are electrically connected in parallel to provide increased surface area for constant cross section.
    Type: Grant
    Filed: August 14, 1981
    Date of Patent: October 25, 1983
    Assignee: Varian Associates, Inc.
    Inventors: Charles R. Kalbfus, Norman L. Turner