Registers – Records – Fluorescent – phosphorescent – radiation emitting
Reexamination Certificate
2006-05-16
2006-05-16
Fureman, Jared J. (Department: 2876)
Registers
Records
Fluorescent, phosphorescent, radiation emitting
C235S494000
Reexamination Certificate
active
07044386
ABSTRACT:
A method for applying surface modifications in at least two patterns that differ in spectral emissivity by known amounts. The patterns form an information-encoding sequence of transitions of differential emissivity along a scan path over the patterns, that encodes a set of information. This information is decoded by a scanner sensitive to emissivity in the given portion of the electromagnetic spectrum, and sensitive to transitions in emissivity of the known amounts, when scanned along the scan path, combined with knowledge of the expected emissivity values of the patterns. This provides secure informational marking of articles and documents, including mail. The patterns may be visible, or hidden, but the emissivity values are not duplicated by standard office equipment, so authenticity of the patterns can be determined using the special emissivity scanner.
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Fish & Neave IP Group of Ropes & Gray LLP
Fureman Jared J.
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