Patents by Inventor Hironobu Tsuboi

Hironobu Tsuboi 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).

  • Semiconductor memory device with an increased band width
    Patent number: 5838604
    Abstract: A semiconductor memory device includes a plurality of bit lines, first sense amplifiers each connected to a corresponding one of the plurality of bit lines, and a first data bus laid out in parallel to the plurality of bit lines and connected to the plurality of bit lines via gates and the first sense amplifiers. The semiconductor memory device further includes column-selection lines laid out perpendicularly to the plurality of bit lines to open at least one of the gates to connect the first data bus to the plurality of bit lines.
    Type: Grant
    Filed: February 20, 1997
    Date of Patent: November 17, 1998
    Assignee: Fujitsu Limited
    Inventors: Hironobu Tsuboi, Yoshinori Okajima, Tsuyoshi Higuchi, Makoto Koga