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:
Sep. 20, 2005
Filed:
Aug. 09, 2001
Masaki Hamamoto, Sakurai, JP;
Hiroyuki Katayama, Nara, JP;
Kunio Kojima, Nabari, JP;
Junichi Sato, Nara, JP;
Kazuhisa Takayama, Tenri, JP;
Kosuke Watanabe, Yao, JP;
Masaki Hamamoto, Sakurai, JP;
Hiroyuki Katayama, Nara, JP;
Kunio Kojima, Nabari, JP;
Junichi Sato, Nara, JP;
Kazuhisa Takayama, Tenri, JP;
Kosuke Watanabe, Yao, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A magnetic signal recording method of the present invention superimposes a recording edge of a recordable region on a region where there is substantial equality between (a) a coercive force in a region on a magnetic recording medium in which the coercive force has been varied, and (b) magnetic field intensity, which is generated by a magnetic recording head. The magnetic field intensity has a magnetic field distribution whose lowering rate in an in-track position is maximum in the region. The magnetic recording head, whose recording magnetic field is distributed in a rectangular shape, is used in this way so as to form a magnetic bit having a rectangular shape that is suitable for reproduction performed by a common reproduction head having a rectangular reproduction region, thereby improving an S/N of a reproduction signal dramatically.