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:
Aug. 03, 1993
Filed:
Jan. 13, 1992
Applicant:
Inventors:
James P Yakura, Colorado Springs, CO (US);
Richard K Cole, Woodland Park, CO (US);
Assignee:
NCR Corporation, Dayton, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365226 ; 365153 ; 365218 ;
Abstract
A memory security device within a chip which employs a power source coupled to the memory. The power source produces a signal having a level sufficient to erase or destroy the memory when the chip is exposed to acid. The power source includes an electrolytic cell for producing a direct voltage output, and an electrolytic signal amplification circuit coupled between the electrolytic cell and the memory.