Registers – Coded record sensors – Particular sensor structure
Patent
1987-01-16
1989-06-06
Salce, Patrick R.
Registers
Coded record sensors
Particular sensor structure
235380, 235437, 235448, 235493, G06K 700
Patent
active
048374261
ABSTRACT:
Apparatus and methods of verifying objects utilize an inherent randomly varying and detectable characteristic of a recordable magnetic region affixed to the object. Detectability of the randomly varying magnetic characteristic can be enhanced by recording a selected electrical signal thereon. Digital and analog signals may be used. Both saturation and nonsaturation forms of recording can be used. A verification apparatus senses the enhanced randomly varying magnetic characteristic and compares it to a prestored representative profile previously created. Correspondence between the prestored profile and the currently read characteristic indicates an authentic object. Other objects can be rejected.
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Copella Robert A.
Flannery Ann M.
Pease Kevin J.
Ault Anita M.
Rand McNally & Company
Salce Patrick R.
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