Patents by Inventor Yasuyoshi Oyama

Yasuyoshi Oyama 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).

  • Transaction processing system
    Patent number: 4525712
    Abstract: In a system for the transaction operation with terminal units connected to a central unit through the communication line, the transaction operation by use of an ineligible terminal unit is prevented. An illegality preventive information is provided for each terminal unit and stored in each terminal unit and the central unit. When the terminal unit transmits transaction data to the central unit, it also transmits the illegality preventive information registered in it. The central unit carries out the transaction process when the received illegality preventive information coincides with or has a certain relationship to the registered information.
    Type: Grant
    Filed: February 18, 1982
    Date of Patent: June 25, 1985
    Assignee: Hitachi, Ltd.
    Inventors: Yoshio Okano, Yasuo Okuma, Kuniomi Aizawa, Yasuyoshi Oyama, Yoichiro Kitamura