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. 12, 2011
Filed:
Mar. 23, 2009
Applicant:
Sadayuki Watanabe, Matsumoto, JP;
Inventor:
Sadayuki Watanabe, Matsumoto, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/66 (2006.01); G11B 5/667 (2006.01); G11B 5/851 (2006.01);
U.S. Cl.
CPC ...
Abstract
A magnetic recording medium is formed by stacking in order, on a nonmagnetic base, at least an underlayer, magnetic recording layer, and protective layer. The magnetic recording layer includes a plurality of magnetic layers and an exchange-coupling control layer, and the magnetic recording medium is characterized in that a physical pattern is formed in the exchange-coupling control layer. The exchange-coupling control layer is located between the magnetic layers of the magnetic recording layer.
Watanabe, Sadayuki. (2011). Magnetic recording medium having a patterned exchange-coupling control layer and method of manufacturing same (U.S. Patent No. 7923135). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7923135
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