Patents by Inventor Kazuhiko Nishi

Kazuhiko Nishi 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).

  • Patent number: 4628467
    Abstract: A video display control system comprises a video display processor (VDP) which is capable of accessing to a video RAM (VRAM) at an extremely high-speed. The VRAM used in this system comprises first and second dynamic RAMs each having an address input terminal to which row address data and column address data are supplied, a row address strobe input terminal, a column address strobe input terminal, and a data input/output terminal. The row address data is latched at the leading edge of a row address strobe signal applied to the row address strobe input terminal, while the column address data is latched at the leading edge of a column address strobe signal applied to the column address strobe input terminal. An access to an address of each dynamic RAM is established when both of the row and column address data are latched. The VDP comprises a VRAM interface for controlling an access to the first and second dynamic RAMs which is connected to the RAMs through a common address bus.
    Type: Grant
    Filed: May 17, 1985
    Date of Patent: December 9, 1986
    Assignees: Ascii Corporation, Nippon Gakki Seizo Kabushiki Kaisha
    Inventors: Kazuhiko Nishi, Takatoshi Ishii, Ryozo Yamashita, Shigemitsu Yamaoka, Takatoshi Okumura, Minoru Morimoto