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:
Nov. 03, 1998
Filed:
Jul. 09, 1997
Applicant:
Inventor:
Toshihisa Tanaka, Yokohama, JP;
Assignee:
Nikon Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
3692753 ; 3692754 ;
Abstract
A disc, such as a magneto-optical disc or an optical disc, for recording data. The disk includes a first track and a second track. The first track is formed at a first level in the disc and is for recording data in a first format. The second track is formed at a second level in the disc and is for recording data in a second format. The first level is a different level than the second level, and the first format is a different format than the second format.