Combined multi-frequency electromagnetic and optical communication system
AssigneeInternational Barcode Corporation
InventorAllen Lubow
Life of this patent
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Abstract
A communication system is provided that includes both an electromagnetic (“EM”) communication device and an optical communication device including at least a machine readable symbol where at least a portion of the EM communication device and at least a portion of the machine readable symbol are formed from the same material. This material may be, for example, a conductable ink or a conductable foil. If desired, the EM communication device may include an antenna where at least a portion of the antenna includes at least a portion of the machine readable symbol.
Claims20
An electromagnetically readable bar code, comprising:
- a series of bars and spaces forming a bar code such that the bar code is optically readable by a bar code reader to determine information optically encoded by the bar code;
- and
- a first resonant structure embedded within at least one bar of the bar code such that the first resonant structure resonates in response to a first frequency;
- and
- a second resonant structure embedded within at least one bar of the bar code such that the second resonant structure resonates in response to a second frequency which is different than said first frequency.
A method of forming a multi-frequency bar code, comprising:
- printing a first resonant structure to:
- be embedded within at least one bar of the bar code such that the first resonant structure resonates in response to a first frequency;
- and
- printing a second resonant structure to be embedded within at least one bar of the bar code such that the second resonant structure resonates in response to a second frequency which is different than said first frequency.
Dependencies are inferred from the claim text.