An Electronic Article Surveillance (EAS) marker is adapted for direct application to optically recorded media such as compact disks, CD-ROM's, laser disks, digital video disks, and the like. The marker includes a support sheet and one or more marker elements which are positioned such that the...http://www.google.com.au/patents/US5825292?utm_source=gb-gplus-sharePatent US5825292 - Electronic article surveillance markers for direct application to optically recorded media 
