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:
Jun. 22, 2004
Filed:
Mar. 20, 2002
Applicant:
Inventor:
Mitsuru Sugita, Hyogo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C 7/00 ; G11C 1/607 ; G11C 8/00 ;
U.S. Cl.
CPC ...
G11C 7/00 ; G11C 1/607 ; G11C 8/00 ;
Abstract
Defect information about a defective memory block is stored into a large capacity memory block having a low rewrite frequency and a block select circuit is provided that selects a backup memory block when the stored defect information is referred and the defective memory block is selected.