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. 14, 1978
Filed:
Apr. 09, 1976
Applicant:
Inventor:
Nobuo Saito, Mitaka, JP;
Assignee:
Hitachi, Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365-1 ; 365 15 ; 365 12 ;
Abstract
A shift register type memory device according to this invention includes on the same chip as that of an information storing medium, a functional part which identifies defect loops and controls the writing and reading of information so as to exclude them. The functional part includes a defect loop address memory which stores locations of the defect loops in the binary expression, and a common detector which reads out information from the defect loop address memory and information from storage loops.