Patent ID: 6895393

Claim:
An electronic information distributing system for distributing an electronic book as an electronic information through communication networks and/or broadcasting networks for purpose of trade, in relation with a paper book containing a same contents in said electronic book, comprising: an electronic information management means for managing information relating to desire to purchase the electronic book, and certification and service thereof; an information sales means for storing, processing and distributing auxiliary information to be attached to the electronic book information to be served and/or attached for serving thereof; and an information transmission means such-as of IC card for transmitting information from said information sales means, wherein said electronic information management means further comprises: a purchase certificate distributing means for distributing a purchase certificate to a purchaser who bought the paper book; a purchase certificate deciding means for deciding the presence of said purchase certificate of a person who desires to obtain the electronic book as the electronic information; and means for providing a plurality of services for the person who desires to obtain the electronic book as the electronic information, depending upon the presence of said purchase certificate, a discount rate to a person who wishes to buy the electronic book being changed upon the presence of the purchase certificate.