Patents by Inventor Takehiko Kumagai

Takehiko Kumagai 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).

  • Single semiconductor substrate RAM device utilizing data compressing/expanding mechanism in a multi-microprocessor environment
    Patent number: 5440718
    Abstract: Compressor/expander circuits which are built in a common semiconductor substrate along with a random access memory unit function so as to realize compression/expansion processes merely through the internal data transfer controls between the circuits and the random access memory unit as based on built-in control unit. This endows the temporary storage of data and the compression/expansion processes hereof with continuities, and achieves higher speeds for the compression/expansion processes.
    Type: Grant
    Filed: September 19, 1994
    Date of Patent: August 8, 1995
    Assignees: Hitachi, Ltd., Hitachi VLSI Engineering Corp.
    Inventors: Takehiko Kumagai, Takashi Kikuchi, Takao Okubo, Yasuyuki Fuse