Registers – Coded record sensors – Particular sensor structure
Patent
1996-05-17
1998-11-10
Hajec, Donald T.
Registers
Coded record sensors
Particular sensor structure
235449, 235493, G06K 703, G06K 1906
Patent
active
058347488
ABSTRACT:
Transactional items such as currency, credit cards, identification cards and the like can be provided with enhanced difficulty to forge or counterfeit by the inclusion of magnetic elements within the transactional item. The signal strength, period, amplitude and/or alignment of the magnetic field may be read as coded information by a magnetic reading head. The encoding of this information can be made increasingly difficult to imitate or forge by varying parameters within these (and other) mechanically readable inscriptions. Filaments coated with magnetic particles are particularly useful magnetic elements for inclusion in transactional items because of their ability to be physically aligned, extend across significant dimensions of the transactional item, and their ready inclusion into manufacturing processes for the transactional items.
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patent: 3409129 (1968-11-01), Sperry
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patent: 4500116 (1985-02-01), Ferro et al.
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patent: 5362952 (1994-11-01), Nair et al.
patent: 5473147 (1995-12-01), Hoshino et al.
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Aveka, Inc.
Hajec Donald T.
Rodriguez Douglas X.
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