using markings of different kinds in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means

Full Title

Record carriers for use with machines and with at least a part designed to carry digital markings > characterised by the kind of the digital marking, e.g. shape, nature, code > using markings of different kinds in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means

Child Classifications

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• G06K 19/083
• G06K 19/10 at least one kind of marking being used for authentication, e.g. of credit or identity cards (verification of coded identity or credit cards in mechanisms actuated by them G07F7/12)