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:
Apr. 01, 1986
Filed:
Jul. 02, 1985
Applicant:
Inventors:
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428336 ; 360131 ; 360135 ; 428446 ; 428461 ; 428472 ; 428693 ; 428694 ; 428900 ;
Abstract
An opto-magnetic recording medium comprises a light-transmitting substrate, a first protective layer comprising a metal film provided in contact with the substrate and transmitting therethrough almost all of a light entering through the substrate, a second protective layer formed of a dielectric material provided on the first protective layer, and a magnetic recording layer provided on the second protective layer and having information recorded or reproduced thereon by the light transmitted through the substrate and the first and second protective layers.