Patents by Inventor Tomokatsu Saito

Tomokatsu Saito 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).

  • Graphic drawing apparatus for generating graphs of implicit functions
    Patent number: 5590255
    Abstract: A graphic drawing apparatus divides an xy plane corresponding to a two-dimensional display region into plural display units. While one of two variables of the polynomial f(x, y) is fixed, a univeriate polynomial is generated. All intervals in which zeros are present are obtained within the width of the display units. By painting pixels of the display units that contain the intervals in which the obtained zeros are present, a graph f(x, y)=0 is precisely displayed. Even if the graphic to be displayed contains a singular point, the vicinity thereof can be precisely drawn.
    Type: Grant
    Filed: March 14, 1995
    Date of Patent: December 31, 1996
    Assignee: Fujitsu Limited
    Inventors: Taku Takeshima, Masayuki Noro, Tomokatsu Saito
  • Computer display
    Patent number: D423475
    Type: Grant
    Filed: January 29, 1999
    Date of Patent: April 25, 2000
    Assignee: Hitachi, Ltd.
    Inventors: Yukinobu Maruyama, Yukio Kuroiwa, Taisuke Kashima, Tomokatsu Saito, Takeshi Katayama