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:
Mar. 17, 1998
Filed:
Mar. 11, 1997
Akihiro Tozaki, Tsurugashima, JP;
Takao Sawabe, Tokyo-to, JP;
Ryuichiro Yoshimura, Tokorozawa, JP;
Yoshiaki Moriyama, Tsurugashima, JP;
Kaoru Yamamoto, Tsurugashima, JP;
Junichi Yoshio, Tokorozawa, JP;
Pioneer Electronic Coporation, Tokyo-to, JP;
Abstract
In a recording medium such as a DVD, various information such as video and audio information is recorded in a form of a plurality of recorded information pieces. Further, control information pieces prescribe the manner of reproducing the recorded information pieces. Copy information indicating whether or not the recorded information pieces are copy-prohibited is prepared and recorded for each of the recorded information pieces. In addition, aggregate copy information pieces indicating whether or not the recorded information pieces under the control by the control information piece are copy-prohibited are recorded. In accordance with the copy information and the aggregate copy information pieces, a copying system performs accurate copy management.