Patents by Inventor Willem Hendrik Jan Andersen

Willem Hendrik Jan Andersen 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 microscope comprising an energy analyzer
    Patent number: 3979590
    Abstract: A Wien filter, used as an energy analyzer in an electron microscope, includes a four-pole lens which enlarges the dispersion of electrons in one direction. By addition of six-pole lenses and an additional four-pole lens, correction can be made for opening errors in the electron beam to be analyzed.
    Type: Grant
    Filed: March 28, 1975
    Date of Patent: September 7, 1976
    Assignee: U.S. Philips Corporation
    Inventor: Willem Hendrik Jan Andersen