Patents by Inventor Stephen W. Cheung

Stephen W. Cheung 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).

  • Traveling wave linear accelerator based x-ray source using current to modulate pulse-to-pulse dosage
    Patent number: 9167681
    Abstract: Provided herein are systems and methods for operating a traveling wave linear accelerator to generate stable electron beams at two or more different intensities by varying the number of electrons injected into the accelerator structure during each pulse by varying the electron beam current applied to an electron gun.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: October 20, 2015
    Assignee: Accuray, Inc.
    Inventors: Stephen W. Cheung, Roger H. Miller, Juwen Wang