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Digital data selling and buying transaction system, auxiliary digital data selling and buying system, digital data selling and buying transaction method, auxiliary digital data selling and buying method, and digital data selling and buying transaction apparatus

  • US 7,720,766 B2
  • Filed: 03/19/2008
  • Issued: 05/18/2010
  • Est. Priority Date: 05/08/2000
  • Status: Expired due to Fees
First Claim
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1. An auxiliary digital data selling and buying system, comprising:

  • a selling processing device for performing a process for selling auxiliary digital data with respect to a process for canceling a limitation of use of digital data;

    a buying processing device for performing a process for buying the auxiliary digital data; and

    a selling and buying processing device for performing a process for receiving a selling request from said selling processing device and a buying request from said buying processing device and for concluding selling and buying transactions;

    said selling processing device, said buying processing device, and said selling and buying processing device being connected to each other through a communication network;

    said selling processing device including;

    storing means for storing the auxiliary digital data,transmitting means for transmitting, through the communication network, identification information and a selling request of a selling applicant of the auxiliary digital data,receiving means for receiving a selling notification for the auxiliary digital data that is transmitted from said selling and buying processing device through the communication network,erasing means for erasing the auxiliary digital data from the storing means, andcontrolling means for controlling said transmitting means so that the identification information and the selling request of the selling applicant are transmitted to said selling and buying processing device, and for controlling said erasing means so that the auxiliary data is erased from the storing means when said receiving means has received the selling notification transmitted from said selling and buying processing device through the communication network;

    said buying processing device including;

    transmitting means for transmitting, through the communication network, identification information and a buying request of a buying applicant of the auxiliary digital data,receiving means for receiving buying notification of the auxiliary digital data transmitted from said selling and buying processing device through the communication network, andcontrolling means for controlling said transmitting means so that the identification information and the buying request of the buying applicant are transmitted to said selling and buying processing device through the communication network; and

    said selling and buying processing device including;

    receiving means for receiving, through the communication network, one or more of the identification information and the selling request of the selling applicant transmitted from said selling processing device and the identification information and the buying request of the buying applicant transmitted from said buying processing device,storing means for storing management information and the auxiliary digital data, the management information correlating the identification information of the selling applicant and the buying applicant and information that represents the state of ownership of the auxiliary digital data and the digital data,selling and buying transaction concluding processing means for concluding the selling and buying transactions of the auxiliary digital data corresponding to the identification information and the selling request of the selling applicant that is received by said receiving means from said selling processing device, and corresponding to the identification information and the buying request of the buying applicant that is received by said receiving means from said buying processing device,transmitting means for transmitting the auxiliary digital data and a selling notification thereof through the communication network, andcontrolling means for updating the management information stored in said storing means corresponding to one or more of the identification information of the selling applicant and the identification information of the buying applicant received by said receiving means, for reading the auxiliary digital data to be transmitted from said storing means to the buying applicant, for controlling said transmitting means so that the auxiliary digital data that has been read to said buying processing device and the selling notification are transmitted to said selling processing device when the selling and buying transactions of the auxiliary digital data concluded.

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