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:
May. 03, 1994
Filed:
Jun. 25, 1993
Applicant:
Inventors:
Ryuichi Iwanaga, Kawasaki, JP;
Masaharu Tsukada, Kawasaki, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369 13 ; 3692754 ; 360114 ;
Abstract
A method for initializing a magnetooptical recording medium having tracks onto which information is recorded are formed in parallel and having intermediate regions among the tracks. The method includes the steps of scanning a track by a laser beam while applying a magnetic field in a predetermined direction, thereby aligning magnetizing directions of the track; and scanning the intermediate region by the laser beam while applying a magnetic field in a predetermined direction, thereby aligning the magnetizing directions of the intermediate region. An apparatus to perform such a method is also disclosed.