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:
Mar. 01, 2016
Filed:
Feb. 08, 2013
Hitachi, Ltd., Tokyo, JP;
Yoshihiro Shiroishi, Hachioji, JP;
Hiroshi Fukuda, Tokyo, JP;
Harukazu Miyamoto, Higashimurayama, JP;
Junko Ushiyama, Kokubunji, JP;
Katsuro Watanabe, Hitachiota, JP;
Yoshiyuki Hirayama, Kokubunji, JP;
Masukazu Igarashi, Kawagoe, JP;
HITACHI, LTD., Tokyo, JP;
Abstract
A microwave assisted magnetic recording head includes a recording magnetic pole unit that produces a recording field for writing to a perpendicular magnetic recording medium, and a high-frequency magnetic field oscillator that produces a high-frequency magnetic field. The recording magnetic pole unit includes a magnetic core with a write gap portion at which a main recording field component is concentrated, and the high-frequency magnetic field oscillator is disposed in the write gap.