The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 22, 2007
Filed:
May. 17, 2001
Takeshi Kikuchi, Hamamatsu, JP;
Kosei Terada, Hamamatsu, JP;
Takeshi Kikuchi, Hamamatsu, JP;
Kosei Terada, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu-shi, JP;
Abstract
The utilization of various distributed contents is restricted by a simple method, its restriction can be released, and an accurate collection of fees for the contents is made possible. A client terminalsends a request of contents (musical scores) and a key file to a servervia a communication lineIn response to the request of these, a WEB servertransmits the contents stored in a databaseand a key issuing servertransmits the key file. The WEB servercharges a fee when the key file is requested. A viewercan only display the musical scores in the absence of the key file. With the use of the key file, however, the viewercan print the musical scores as well. The key file is formed in accordance with a random value that is synchronized with the timing of an instruction for purchasing the contents.