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. 14, 1989
Filed:
Jun. 10, 1987
Applicant:
Inventors:
Gilles Lisimaque, Peynier, FR;
Serge Fruhauf, Peynier, FR;
Assignee:
Thomson Composants Militaires Et Spaciaux, Paris, FR;
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365228 ; 365206 ; 365207 ; 371 21 ; 371 67 ;
Abstract
A fraud-preventive device for a memory card comprising an EPROM type or similar non-volatile memory designed to receive confidential authorization data as well as the results, wrong or otherwise, of tests on the authorization data, comprises a single simulation cell designed to record the non-erroneous results, this cell consuming the same current as a memory cell, which has never been programmed, of the memory part designed to record the wrong data.