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. 24, 1994
Filed:
Mar. 06, 1992
Fumiyoshi Kirino, Suginami, JP;
Junko Nakamura, Kokubunji, JP;
Ryo Suzuki, Hachiouji, JP;
Masafumi Yoshihiro, Yuuki, JP;
Yukinori Yamada, Tsukuba, JP;
Norio Ohta, Kitasouma, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Maxell, Ltd., Osaka, JP;
Abstract
An optical recording/ reproducing method which is characterized by irradiating a magnetic material having a perpendicular anisotropy with a laser beam to cause a change in the perpendicular anisotropy in the magnetic material to a non-perpendicular anisotropy thereby to record information; and by reproducing the information by detecting a change in a magneto-optic effect such as the Kerr effect. Also disclosed are an optical recording material and an optical recording device for use in the optical recording/reproducing method.