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:
May. 06, 2003
Filed:
Dec. 12, 2000
Hideki Saga, Kokubunji, JP;
Hiroaki Nemoto, Kokubunji, JP;
Hirofumi Sukeda, Tokorozawa, JP;
Masahiko Takahashi, Uenohara, JP;
Kimio Nakamura, Kokubunji, JP;
Yohji Maruyama, Iruma, JP;
Hiroshi Ide, Kodaira, JP;
Takehiko Hamaguchi, Fuchu, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An information recording apparatus using a recording medium which holds information by reversed magnetic domains on a perpendicular magnetic recording film includes an irradiation unit for applying electromagnetic energy or light onto the recording medium, and a magnetic flux detection unit for detecting magnetic leakage flux emerging from the recording medium, the magnetic flux detection unit being disposed on the same side as the irradiation unit with respect to the recording medium. As a result, both side recording of the recording medium can be conducted.