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:
Jul. 24, 2007
Filed:
Aug. 16, 2000
Han Zou, Windsor, NJ (US);
Terry J. Nelson, New Providence, NJ (US);
Han Zou, Windsor, NJ (US);
Terry J. Nelson, New Providence, NJ (US);
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A copy-resistant read-only digital optical disc having encrypted digital data. The copy-resistant read-only digital optical disc includes a digital work, a variable user data format encoding said digital work after encryption with a variable software algorithm, an implementation of said variable software algorithm, and an implementation of said variable user data format encoded in a default format. The encrypted digital data is read on an adaptable digital optical disc player, which is adaptable to a user data format described on said copy-resistant read-only digital optical disc made in accordance with this invention. A copy-resistant read-only digital optical disc made in accordance with this invention will provide necessary user data format information on the disc in a default format, which is always accessible by an adaptable player.