Patents by Inventor Masayuki Akatsuka

Masayuki Akatsuka 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).

  • Optical character reading system
    Patent number: 4364023
    Abstract: An optical character reading system in which a sheet upon which characters or symbols are printed is illuminated and the characters scanned with a two-dimensional photoelectric sensor. Output signals from the sensors are processed to read the characters through right and left frame detecting circuits. The right and left frame detecting circuits detect white/black patterns of frames formed on the sensor when the left and right sides of the characters extend beyond the ends of the ranges of the sensor. A circuit combines the white/black patterns detected by the right and left frame detecting circuits to provide a recognition of the characters being scanned.
    Type: Grant
    Filed: June 5, 1980
    Date of Patent: December 14, 1982
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Isao Isshiki, Koji Sato, Katsuyoshi Sunago, Akihiro Ohoka, Masayuki Akatsuka
  • Silicon nitride ceramic tools and a process for their production
    Patent number: 4304576
    Abstract: A silicon nitride based ceramic tool is disclosed which is prepared from the starting powder compositions surrounded by and including the lines defined by the points A, B, and C and preferably D, E, and F in the FIGURE.
    Type: Grant
    Filed: November 5, 1979
    Date of Patent: December 8, 1981
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Yoshinori Hattori, Masayuki Akatsuka, Yasushi Matsuo, Isamu Fukuura