An identification card system is disclosed which comprises a plastic card blank of a size and thickness that is commercially used for credit card purposes and which may have the identity of the person, company or the like to whom it is issued embossed thereon as well as art work and information identifying...http://www.google.com.au/patents/US4066873?utm_source=gb-gplus-sharePatent US4066873 - Identification and access card with associated optical decoding means
