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:
Jun. 14, 1994
Filed:
Apr. 07, 1992
Yukinori Okazaki, Hirakata, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An optical disk provided with a ROM area for reproduction only, in which information for reproduction only and first retrieval information for retrieving the information for reproduction only are recorded in embossed shape and a rewritable area in which information can be additionally recoded or rewritten, wherein on the basis of each of a plurality of additionally recording and rewriting logical specifications of respective appliances utilizing the optical disk, the first retrieval information is converted into second retrieval information, wherein the second retrieval information corresponds to at least one of the appliances and is recorded in the rewritable area together with third retrieval information for the additionally recordable and rewritable information so as to be additionally recordable or rewritable, and an apparatus for recording and reproducing the optical disk.