In case a file is prepared by executing an application, the fee for the use of the application is charged according to whether such file is subjected to an output process. Thus the user of the application need not pay the fee for the use of the application for the mere preparation of the file by using...http://www.google.de/patents/US20020051164?utm_source=gb-gplus-sharePatent US20020051164 - Application charging system, information processing apparatus, and control method therefor and memory medium storing program therefor
