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:
Jul. 09, 1996
Filed:
Apr. 17, 1995
Applicant:
Inventor:
Masanobu Okabe, Kanagawa, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ; G11B / ;
U.S. Cl.
CPC ...
364449 ; 340995 ; 3692753 ;
Abstract
In a composite disc having a read-only area and a recordable area, user data corresponding to a map information which has been preliminarily recorded in a read-only area, is recorded to the recordable area, so that the user data corresponding to the map information can be written on the magneto-optical disc. Thereby, there can be realized a navigation system in which a large volume of user data can be reserved without a provision of a back-up power source and easiness in use is markedly improved.