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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 6347016 B1

PDFFull Text
Date of Patent:
Feb. 12, 2002

Filed:

Jul. 13, 1998

Master information carrier, process for producing the carrier, and method and apparatus for recording master information signal on magnetic recording medium by using the carrier

Applicant:
Inventors:

Tatsuaki Ishida, Osaka, JP;

Ryuji Sugita, Ibaraki, JP;

Kiyokazu Tohma, Osaka, JP;

Keizou Miyata, Osaka, JP;

Hiroshi Ryonai, Osaka, JP;

Assignee:

Matsushita Electric Industrial Co., Ltd., Osaka, JP;

Attorney:

Merchant & Gould P.C.

Primary Examiner:

David Hudspeth

Assistant Examiner:

Dan I Davidson

Int. Cl.
CPC ...
G11B 5/86 ;
U.S. Cl.
CPC ...
G11B 5/86 ;
Abstract

A master information carrier comprises a substrate whose surface has an embossed pattern corresponding to an information signal. At least a surface of the protruding portion of the embossed pattern is made of a ferromagnetic material. A method for writing an information signal into a sheet or disk magnetic record medium with a ferromagnetic thin film or coating is performed by putting the surface of the magnetic record medium into contact with the master information carrier so as to write a magnetized pattern corresponding to the embossed pattern of the master information carrier into the magnetic record medium.

Find Patent Forward Citations

Ishida, Tatsuaki. (2002). Master information carrier, process for producing the carrier, and method and apparatus for recording master information signal on magnetic recording medium by using the carrier (U.S. Patent No. 6347016). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6347016

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

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