WO/2008/005724 is referenced by 2 patents.

An optical identification tag comprising a retroef lective layer and a light encoding layer positioned over the retroref lective layer is affixed to a license plate of an automobile 110. A transceiver 500 is depicted illuminating the automobile 110 with a laser beam 130. A structured light pattern 140 is returned from optical identification tag 200 back to transceiver 500. Transceiver 500 may decode information encoded in the structured light pattern returned from tag 200.

Title
Passive electro-optical identification
Application Number
PCT/US2007/071955
Publication Number
2008/005724
Application Date
June 23, 2007
Publication Date
January 10, 2008
Inventor
Thomas Iii Fred Charles
Agent
ALTMAN Daniel E
Assignee
Thomas Iii Fred Charles
Britta Technologies
IPC
G06K 19/06
G02B 05/12
G06K 07/10
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