Patent ID: 6714120
Filing Date: 2004-03-30
Classification: G06K

Abstract:
A tag which uses radio frequency waves transmitted from a scanning device in order to identify an item to which said tag is attached or with which said tag is associated, comprising:a first insulating layer having a top surface and a bottom surface; a plurality of resonant circuits formed on said first insulating layer, each of said plurality of resonant circuits formed on one of the top surface and the bottom surface of said first insulating layer and having a resonant frequency associated therewith, each of said plurality of resonant circuits including capacitance and inductance elements, said capacitance and inductance elements comprising an inwardly spiralled coil connected to an outwardly spiralled coil forming a substantially double spiral shape on said first insulating layer; and wherein said tag is associated with a binary number established by a pattern of ones and zeros depending on each circuits' resonance or nonresonance, respectively.