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:
Jan. 03, 1995
Filed:
Feb. 11, 1993
Applicant:
Inventors:
Larry W Sarner, Loveland, CO (US);
David C Beckwith, Boulder, CO (US);
Assignee:
United States Voting Machines, Inc., Boulder, CO (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
364409 ; 235 56 ; 235386 ;
Abstract
A method and apparatus for locking a memory device to prevent unauthorized data from being written to the memory device is disclosed. In a preferred embodiment an address of a memory device is selected such that when that address is selected, a '1' is written to an auxiliary memory device. This event causes the write-enable of the main memory to be disabled thereby locking the main memory device and preventing subsequent write operations thereto.