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:
Jan. 08, 2002
Filed:
Apr. 21, 1999
Applicant:
Inventor:
Kyoichi Shirane, Kanagawa, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B 1/518 ;
U.S. Cl.
CPC ...
G11B 1/518 ;
Abstract
In a servo area S on a track that is empty of data and that lies outside a user data read/write area, to and from which a user data of a floppy disc is written and read, format information FI of the floppy disc is recorded. The format information FI is recorded along with a track number TN in a gray code area G in the servo area S . Thereby, the format of the floppy disc can be identified with no identification hole or the like formed in an envelope encasing the floppy disc.