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:
Sep. 06, 1994
Filed:
Aug. 26, 1992
Applicant:
Inventor:
Yoshimori Yamasaki, Kanagawa, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
3692753 ; 369 13 ; 3692751 ; 360 48 ;
Abstract
An optical disc having a plurality of recording zones, each having 2.sup.n tracks, with the recording capacity of each track in a given zone being equal and the recording capacity being different for each recording zone, and with a line recording density of each recording zone being approximately equal.