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. 18, 1991
Filed:
Sep. 14, 1988
Applicant:
Inventor:
Ryuichi Naito, Saitama, JP;
Assignee:
Pioneer Electronic Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ; G11B / ;
U.S. Cl.
CPC ...
369 36 ; 369 34 ; 369178 ; 3642384 ; 364200 ; 3642494 ;
Abstract
An autochanger of writable discs automatically transfers a write-once optical disc between a disc accommodation unit and a recording/reading device where data are recorded into the optical disc and read from that. In order to shorten a disc loading time, address information of sectors in which the latest defect management information is stored is written into an erasable non-volatile memory IC and renewed when a new defect sector is found in the optical disc.