Patents by Inventor Masakatu Yokoyama

Masakatu Yokoyama 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 data processing system
    Patent number: 5448689
    Abstract: A graphic processor which controls reading, writing and transfer of graphic data for a display memory that stores graphic data. The processor includes a first unit which stores first address information for addressing the display memory and first pixel address information which points a pixel position in a word specified by the first address information, a second unit which stores second address information for addressing the display memory and second pixel address information which points a pixel position in a word specified by the second address information, a third unit which shifts graphic data of multiple pixels included in two consecutive words to extract continuous 1-word graphic data, and a fourth unit which implements drawing computations pixel-wise concurrently for one word depending on the number of pixels included in a word.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: September 5, 1995
    Assignees: Hitachi, Ltd., Hitachi Engineering Co., Ltd.
    Inventors: Shigeru Matsuo, Koyo Katsura, Jun Sato, Takashi Sone, Masakatu Yokoyama
  • Graphic processor suitable for graphic data transfer and conversion processes
    Patent number: 5202962
    Abstract: A graphic processor which controls reading, writing and transfer of graphic data for a display memory that stores graphic data. The processor includes a first unit which stores first address information for addressing the display memory and first pixel address information which points a pixel position in a word specified by the first address information, a second unit which stores second address information for addressing the display memory and second pixel address information which points a pixel position in a word specified by the second address information, a third unit which shifts graphic data of multiple pixels included in two consecutive words to extract continuous 1-word graphic data, and a fourth unit which implements drawing computations pixel-wise concurrently for one word depending on the number of pixels included in a word.
    Type: Grant
    Filed: June 27, 1990
    Date of Patent: April 13, 1993
    Assignees: Hitachi, Ltd., Hitachi Engineering Co., Ltd.
    Inventors: Shigeru Matsuo, Koyo Katsura, Jun Sato, Takashi Sone, Masakatu Yokoyama
  • Graphic processor suitable for graphic data transfer and conversion processes
    Patent number: 4965750
    Abstract: A graphic processor which controls reading, writing and transfer of graphic data for a display memory that stores graphic data. The processor includes a first unit which stores first address information for addressing the display memory and first pixel address information which points a pixel position in a word specified by the first address information, a second unit which stores second address information for addressing the display memory and second pixel address information which points a pixel position in a word specified by the second address information, a third unit which shifts graphic data of multiple pixels included in two consecutive words to extract continuous 1-word graphic data, and a fourth unit which implements drawing computations pixel-wise concurrently for one word depending on the number of pixels included in a word.
    Type: Grant
    Filed: March 30, 1988
    Date of Patent: October 23, 1990
    Assignees: Hitachi, Ltd., Hitachi Engineering Co., Ltd.
    Inventors: Shigeru Matsuo, Koyo Katsura, Jun Sato, Takashi Sone, Masakatu Yokoyama