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:
Apr. 12, 1994
Filed:
Jul. 05, 1991
Kaoru Adachi, Tokyo, JP;
Kouichi Gouhara, Tokyo, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A method of recording data in a memory card having an EEPROM, and a memory card system using the same are provided. A memory card has at least two collective erasure type EEPROM chips where at least one of which is conditioned for a spare memory. When an access of the kind needing overwriting is made to the memory card, data stored in memory locations of the addresses of a corresponding EEPROM chip, except for the address where overwriting is to occur, are copied in the spare memory, and then the EEPROM chip of interest and the spare memory are replaced with each other. The EEPROM chips may be replaced with a plurality of memory blocks or clusters defined in a block erasure type EEPROM.