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. 17, 1992
Filed:
Mar. 09, 1990
Hitachi, Ltd., Tokyo, JP;
Abstract
A memory card comprises an index area, and a data area including a plurality of extents in each of which data is recorded. The index area includes in correspondence with each of the extents, an area for entering a file name, a status indicating area for entering the number of bytes to be recorded per sector, and areas for entering the beginning and end addresses of the corresponding extent, respectively. The memory card is accessed in such a way that the index area is read to decide if a desired file name exists, and that the status indicating area is read subject to the existence of the desired file name. A control unit translates an address premised on a floppy disc into an address for accessing the memory card, on the basis of the number of bytes entered in the status indicating area, and then accesses the memory card.