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:
Mar. 09, 1982
Filed:
Dec. 28, 1979
Applicant:
Inventor:
Jean H Mollier, Bougival, FR;
Assignee:
Compagnia Internationale pour l'Informatique, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R / ;
U.S. Cl.
CPC ...
371 21 ; 324 / ; 365201 ; 371-4 ; 371 24 ;
Abstract
A control character having a predetermined sequence of binary values is written into a control zone of a memory matrix. It is impossible to alter the binary values in the control zone during normal operation of the matrix, but it is possible to read out the values stored in the control zone during normal operation. A comparison is made with the signals read out from the control zone during normal operation with predetermined values for the bits in the control zone, to determine if deleterious effects, during normal operation, have altered the data stored in the remaining zones of the matrix.