A multi-access card and card holder upon which the machine readable service access codes for a plurality of service providers may be reproduced, comprising at least one card having a plurality of machine readable service access codes reproduced thereon, including at least one machine readable magnetic...http://www.google.es/patents/US5506395?utm_source=gb-gplus-sharePatente US5506395 - Multi-access card and card holder with a plurality of machine readable service access codes placed thereon
Multi-access card and card holder with a plurality of machine readable ...
