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:
Jul. 04, 1995
Filed:
May. 10, 1994
Applicant:
Inventors:
Nobuhiro Umebayashi, Tsukuba, JP;
Minoru Fujita, Toride, JP;
Assignee:
Hitachi Maxell, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360131 ; 360135 ;
Abstract
There is provided a magnetic recording medium which is highly reliable so that tracking servo can be properly effected wherein Z.ltoreq.0.49 is established when light reflectance on a data track is represented by X, light reflectance of a magnetic head-tracking recess is represented by Y, and Z=Y/X.