By passive credit-cards adapted therefor

Official title: {by passive credit-cards adapted therefor, e.g. constructive particularities to avoid counterfeiting, e.g. by inclusion of a physical or chemical security-layer (for security documents G07D7/00; for the reading of record-carriers in general G06K7/00; for the design of coded credit-cards G06K19/10)}

G07F7/086 (By passive credit-cards adapted therefor) appears on 868 US grants and 639 published applications in this corpus.