LASER ETCHED SECURITY FEATURES FOR IDENTIFICATION DOCUMENTS AND METHODS OF MAKING SAME
摘要
The invention provides a method of producing a security feature in an identification document. A core (50) including a top surface and a bottom surface is provided. A pattern (62) is laser etched into the top surface of the identification document.
申请公布号
WO03055638(A1)
申请公布日期
2003.07.10
申请号
WO2002US41644
申请日期
2002.12.24
申请人
DIGIMARC ID SYSTEMS, LLC;JONES, ROBERT;THEODOSSIOU, GEORGE
