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:
Feb. 08, 1994
Filed:
Dec. 11, 1992
Applicant:
Inventor:
Nobuhide Matsuda, Hirakata, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
3692753 ; 369 32 ; 369 4426 ; 369 4428 ; 369 47 ;
Abstract
A magneto-optic disk includes tracks each of which is divided into a plurality of blocks in order to define the locations where data is stored. Each block has address information recorded as a pit providing an address. The plurality of blocks are arranged non-equidistantly, or the pattern is changed according to the track position, to enable detection of a sector position or a track position.