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. 26, 1994
Filed:
Sep. 24, 1992
Applicant:
Inventor:
Yoshio Kiriu, Hadano, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
395250 ; 3649642 ; 3642434 ;
Abstract
An extended, hierarchical storage system includes a main storage, an extended storage, and a work storage having a speed and capacity intermediate therebetween, Additionally, a relatively small, high-speed buffer storage is provided as an adjunct to a processor. The work storage implements a store-in mode and incorporates a flag representative of validity of data therein, which, in turn, impacts upon whether an update to lower ranking memory is necessary upon removal of data stored therein.