专利内容由知识产权出版社提供
专利名称：Security devices
发明人：Adam Lister,Lawrence Commander申请号：US12743201申请日：20081031公开号：US08381988B2公开日：20130226
专利附图：
摘要：The present invention relates to improvements in security devices that can beused in varying shapes and sizes for various authenticating or security applications, and inparticular to an optically variable security device utilizing colorshift materials. Thesecurity device () comprises a first and a second layer (, lib) of a colorshifting material at
least partially overlying each other and each having different colorshifting properties. Atleast partially applied over surface of one of the colorshifting layers is a light controllayer () having a surface structure which modifies the angle of reflected light, such thatlight reflected by the security device is seen at a different viewing angle.
申请人：Adam Lister,Lawrence Commander
地址：Hampshire GB,Reading GB
国籍：GB,GB
代理机构：Gable Gotwals
更多信息请下载全文后查看
