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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.:

US 6301199 B1

PDFFull Text
Date of Patent:
Oct. 09, 2001

Filed:

Jul. 01, 1998

Magneto-optical recording medium and recording/reproducing apparatus therefor in which recorded magnetic domains are transferred from the recording layer to the reproducing layer

Applicant:
Inventors:

Atsushi Yamaguchi, Ogaki, JP;

Naoyuki Takagi, Fuwa-gun, JP;

Yoshiharu Uchihara, Ogaki, JP;

Satoshi Sumi, Gifu, JP;

Hiroyuki Awano, Noda, JP;

Hiroshi Shirai, Kitasohma-gun, JP;

Hitoshi Watanabe, Yuuki-gun, JP;

Norio Ohta, Tsukuba-gun, JP;

Assignee:

Other;

Attorney:

Armstrong, Westerman, Hattori, McLeland & Naughton, LLP

Primary Examiner:

Ali Neyzari

Int. Cl.
CPC ...
G11B 1/100 ;
U.S. Cl.
CPC ...
G11B 1/100 ;
Abstract

A magneto-optical recording medium which includes a reproducing layer. When a laser beam is irradiated to the magneto-optical recording medium, a magnetic domain in a recording layer is transferred, through enlargement, to a reproducing layer increased in temperature. The magneto-optical recording medium further includes a calibration area that has a calibration magnetic domain recorded in a predetermined pattern in the recording layer. In a reproducing apparatus, a laser beam of an optical head is adjusted in output depending upon a reproduced signal obtained by reproducing the calibration magnetic domain.

Find Patent Forward Citations

Yamaguchi, Atsushi. (2001). Magneto-optical recording medium and recording/reproducing apparatus therefor in which recorded magnetic domains are transferred from the recording layer to the reproducing layer (U.S. Patent No. 6301199). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6301199

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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