Patents by Inventor John A. Venables

John A. Venables 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).

  • Auger spectrometry
    Patent number: 5003172
    Abstract: An objective lens in an electron microscope is adapted to detection of Auger electrons. Using an additional lens field, preferably including the use of a VAIL lens, the electrons to be detected are spiraled to a selection space. Between the lens field and the selection space a preferably displaceable, magnetic diaphragm is arranged for the separation of lens fields.
    Type: Grant
    Filed: April 27, 1989
    Date of Patent: March 26, 1991
    Assignee: U.S. Philips Corporation
    Inventors: Pieter Kruit, Arno J. Bleeker, John A. Venables