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. 05, 1992
Filed:
Sep. 15, 1989
Heitaro Nakajima, Tokyo, JP;
Masahiro Hotori, Kanagawa, JP;
Hiroshi Ogawa, Kanagawa, JP;
Kazuhiko Fujiie, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
The optical disc according to the present invention includes an unrewritable region in which the number of times of possible recording or the cumulative possible recording time duration is recorded in advance. The apparatus for recording signals on this optical disc according to the present invention reproduce the number of times of possible recording or the cumulative possible recording time duration recorded in the unrewritable region of the optical disc and inhibits the recording operation when the number of times of recording or the cumulative recording time duration exceeds the aforementioned number of times of possible recording or the cumulative possible recording time duration.