Patents by Inventor Tsutomu Nagashige

Tsutomu Nagashige 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).

  • Print sheet original authentication system, printer device and checking device
    Patent number: 7202960
    Abstract: An original authentication system and structural elements thereof is provided, in which it is possible to easily distinguish between an original and a copy. The checking device 13 comprises: a print sheet reading sensor 201 for reading the print pattern of the print sheet; a mark information checking portion 202 for detecting the mark information from the print pattern of the read print sheet, for checking the mark and for calculating the remaining mark amount; a generation control information detection portion 203 for detecting the generation control information of the print pattern of the read print sheet, and extracting the remaining mark amount from said generation control information; and a remaining mark amount comparison portion 204 for comparing the calculated remaining mark amount obtained by mark detection with the remaining mark amount extracted from the generation control information.
    Type: Grant
    Filed: May 20, 2002
    Date of Patent: April 10, 2007
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Tsutomu Nagashige
  • Print sheet original authentication system, printer device and checking device
    Publication number: 20020171862
    Abstract: An original authentication system and structural elements thereof is provided, in which it is possible to easily distinguish between an original and a copy. The checking device 13 comprises: a print sheet reading sensor 201 for reading the print pattern of the print sheet; a mark information checking portion 202 for detecting the mark information from the print pattern of the read print sheet, for checking the mark and for calculating the remaining mark amount; a generation control information detection portion 203 for detecting the generation control information of the print pattern of the read print sheet, and extracting the remaining mark amount from said generation control information; and a remaining mark amount comparison portion 204 for comparing the calculated remaining mark amount obtained by mark detection with the remaining mark amount extracted from the generation control information.
    Type: Application
    Filed: May 20, 2002
    Publication date: November 21, 2002
    Inventor: Tsutomu Nagashige