Patents by Inventor Tatsuyuki Ushiroda

Tatsuyuki Ushiroda 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).

  • Apparatus for reading mark sheets
    Patent number: 4633507
    Abstract: Apparatus with optical detecting device for reading a mark sheet provided with plural mark rows, each of which includes a reference mark, a skew detection mark and mark writing regions. The apparatus reads the mark sheet by use of a predetermined nominal scan window address for each of the regions. Optical shift of the optical detecting device is detected and the scan window addresses are corrected in accordance with the detected shift. Further, skew of the mark sheet is detected, and scan lines for reading the mark sheet is selected in accordance with the detected skew.
    Type: Grant
    Filed: September 16, 1983
    Date of Patent: December 30, 1986
    Inventors: Anthony T. Cannistra, Masuyoshi Kida, Min-Hsiung G. Tung, Tatsuyuki Ushiroda