Patents by Inventor Harumoto Sawada

Harumoto Sawada 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).

  • X-ray apparatus
    Patent number: 5517545
    Abstract: This invention aims at providing an X-ray apparatus having a stable X-ray output. Since the focus electrode of the X-ray tube of the X-ray apparatus according to this invention maintains a ground potential, the focus diameter of electrons bombarded against a target becomes constant. Hence, the X-ray output emerging from an exit window is stabilized. Since the potential ratio of a cathode to the target is always constant, the electric field distribution between the cathode and the target is stabilized, thereby stabilizing the X-ray output emerging from the exit window.
    Type: Grant
    Filed: July 15, 1994
    Date of Patent: May 14, 1996
    Assignee: Hamamatsu Photonics K.K.
    Inventors: Tsutomu Nakamura, Takane Yokoi, Yutaka Ochiai, Mitsumasa Furukawa, Hiroki Kawakami, Tadaoki Matsushita, Harumoto Sawada, Toshihiro Suzuki