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. 11, 1991
Filed:
Oct. 31, 1988
Applicant:
Inventors:
Ryuichi Naito, Saitama, JP;
Tsuneo Ishii, Saitama, JP;
Assignee:
Pioneer Electronic Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
371 401 ; 360 722 ; 369 57 ; 369 58 ; 371 511 ;
Abstract
In a finally recorded sector detecting system suitable for a write-once type optical disc device, an error correction code or error detection code provided for each index sector is utilized to detect a state of errors occurring in reproduced index signals, and a finally recorded index sector is determined from the state of errors thus detected.