.Iadd.An electronically alterable data card, identification card, and card decoder and encoder circuitry utilizing keyboard data input, data scrambling circuitry and data comparison on circuitry for validation and access purposes..Iaddend....http://www.google.es/patents/USRE29057?utm_source=gb-gplus-sharePatente USRE29057 - Electronic identification system employing a data bearing identification card
Electronic identification system employing a data bearing identification card
