Security markers for indicating condition of an item

Gary A. Ross (Inventor), Graham I. Johnson (Inventor), Barrie Clark (Inventor), Simon J. Forrest (Inventor)

Research output: Patent

Abstract

A method of indicating the condition of an item comprises illuminating the item to excite one or more photoluminescent markers incorporated within the item. Photoluminescent emission from the markers in response to the excitation is compared to one or more pre-defined photoluminescent signatures indicating different conditions of the item.
Original languageEnglish
Patent numberUS 7,378,675 B2
Filing date2/11/05
Publication statusPublished - 27 May 2008
Externally publishedYes

Cite this

Ross, G. A., Johnson, G. I., Clark, B., & Forrest, S. J. (2008). Security markers for indicating condition of an item. (Patent No. US 7,378,675 B2). USPTO (United States Patent and Trademark Office).
Ross, Gary A. (Inventor) ; Johnson, Graham I. (Inventor) ; Clark, Barrie (Inventor) ; Forrest, Simon J. (Inventor). / Security markers for indicating condition of an item. USPTO (United States Patent and Trademark Office). Patent No.: US 7,378,675 B2. Nov 02, 2005.
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Ross, GA, Johnson, GI, Clark, B & Forrest, SJ Nov. 02 2005, Security markers for indicating condition of an item, Patent No. US 7,378,675 B2.

Security markers for indicating condition of an item. / Ross, Gary A. (Inventor); Johnson, Graham I. (Inventor); Clark, Barrie (Inventor); Forrest, Simon J. (Inventor).

USPTO (United States Patent and Trademark Office). Patent No.: US 7,378,675 B2. Nov 02, 2005.

Research output: Patent

TY - PAT

T1 - Security markers for indicating condition of an item

AU - Ross, Gary A.

AU - Johnson, Graham I.

AU - Clark, Barrie

AU - Forrest, Simon J.

PY - 2008/5/27

Y1 - 2008/5/27

N2 - A method of indicating the condition of an item comprises illuminating the item to excite one or more photoluminescent markers incorporated within the item. Photoluminescent emission from the markers in response to the excitation is compared to one or more pre-defined photoluminescent signatures indicating different conditions of the item.

AB - A method of indicating the condition of an item comprises illuminating the item to excite one or more photoluminescent markers incorporated within the item. Photoluminescent emission from the markers in response to the excitation is compared to one or more pre-defined photoluminescent signatures indicating different conditions of the item.

M3 - Patent

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PB - USPTO (United States Patent and Trademark Office)

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Ross GA, Johnson GI, Clark B, Forrest SJ, inventors. Security markers for indicating condition of an item. US 7,378,675 B2. 2008 May 27.