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:
Oct. 01, 2013
Filed:
Jul. 03, 2012
Kenichiro Yamada, Tokyo, JP;
Hitoshi Iwasaki, Kanagawa-ken, JP;
Junichi Akiyama, Kanagawa-ken, JP;
Masayuki Takagishi, Tokyo, JP;
Tomomi Funayama, Saitama-ken, JP;
Masahiro Takashita, Kanagawa-ken, JP;
Mariko Shimizu, Kanagawa-ken, JP;
Shuichi Murakami, Tokyo, JP;
Tadashi Kai, Tokyo, JP;
Kenichiro Yamada, Tokyo, JP;
Hitoshi Iwasaki, Kanagawa-ken, JP;
Junichi Akiyama, Kanagawa-ken, JP;
Masayuki Takagishi, Tokyo, JP;
Tomomi Funayama, Saitama-ken, JP;
Masahiro Takashita, Kanagawa-ken, JP;
Mariko Shimizu, Kanagawa-ken, JP;
Shuichi Murakami, Tokyo, JP;
Tadashi Kai, Tokyo, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
An example magnetic writing head includes a main magnetic pole, a coil to generate an ampere magnetic field to magnetize the main magnetic pole to cause the magnetized main magnetic pole to generate a magnetic field, and a laminated body. The laminated body includes a first magnetic layer having a coercivity lower than the magnetic field applied by the main magnetic pole and a second magnetic layer having a coercivity lower than the magnetic field applied by the main magnetic pole.