Patents by Inventor Yasuyuki Takai

Yasuyuki Takai 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).

  • High strength high modulus carbon fibers
    Patent number: 4913889
    Abstract: High strength, high modulus carbon fibers derived from high mesophase content pitch, having a plurality of sheets formed of planes of hexagonal carbon networks oriented, in the direction of the fiber axis and having a cross-sectional arrangement which does not carbonize to a graphitic structure are characterized by electron and X-ray diffraction pattern wherein the (10) band is not resolved into (100) and (101) lines, by an interlayer spacing greater than 3.38 angstrom and by negative magnetic resistivity when composed to graphitized fibers.
    Type: Grant
    Filed: November 12, 1987
    Date of Patent: April 3, 1990
    Assignee: Kashima Oil Company
    Inventors: Yasuyuki Takai, Minoru Takabatake, Hideyuki Nakajima, Katsumi Takano, Masami Watanabe
  • Random access memory file apparatus for personal computer with external memory file
    Patent number: 4791564
    Abstract: A memory file system suitable for a computer such as a personal computer comprises a central processing unit (CPU) for controlling the operation of the computer, an external memory such as a sequential access type floppy disc for storing data, a printer for printing out the data with the help of the CPU, and a random access memory (RAM) for storing code data to be forwarded into the the external memory. The RAM stores the data together with a directory.
    Type: Grant
    Filed: February 22, 1988
    Date of Patent: December 13, 1988
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Yasuyuki Takai
  • Graphic display system for personal computer
    Patent number: 4763118
    Abstract: A graphic display circuit for driving a graphic display comprises a programmable character generator for storing character font data, a video RAM for storing display code data corresponding to characters in said font, an attribute RAM for storing block selection data for selecting one of the blocks of the character generator defining attributes of the character font data, and a controller for controlling the video RAM and attribute RAM.
    Type: Grant
    Filed: April 30, 1985
    Date of Patent: August 9, 1988
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Yasuyuki Takai