Patents by Inventor Paul S. Da Lin

Paul S. Da Lin 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 with an asymmetrical immersion lens
    Patent number: 5079428
    Abstract: A magnetic electron focusing lens including a first pole piece, from a back side of which low-energy electrons are injected, and a second pole piece located on a front side of the first pole piece. The first and second pole pieces are coupled to form a single magnetic circuit. The first pole piece is shaped to maximize the magnetic field at a its front side at a peak much closer to the first then to the second pole piece. The specimen is located between the first and second pole pieces near the peak of the magnetic field.
    Type: Grant
    Filed: August 31, 1989
    Date of Patent: January 7, 1992
    Assignees: Bell Communications Research, Inc., Arch Development Corp.
    Inventors: Paul S. Da Lin, Zhifeng Shao