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:
Aug. 12, 1997
Filed:
Apr. 21, 1994
Naoki Nishimura, Tokyo, JP;
Eiichi Fujii, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A magnetooptical recording medium for information recording and information reproduction includes plural thin films, including at least a reproducing layer and a recording layer, laminated on a substrate. The reproducing layer is composed of a magnetic thin film which assumes a horizontally magnetized state at room temperature but assumes a vertically magnetized state above a predetermined temperature higher than the room temperature. The magnetization in the horizontally magnetized state is free from vertical orientation, including the magnetic wall. The recording layer is composed of a magnetic thin film which assumes a vertically magnetized state at room temperature and above the predetermined temperature.