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Hybrid card reader
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Decoder for magnetic stripe recording
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Hand swipe magnetic stripe encoder
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Loop communication system
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Magnetic ink character decoder
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Recorder system with demand actuation
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Method of making a digital magnetic head structure
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Automatic data capture for multiple form point of sale slip packs
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Digital magnetic head structure
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Magnetic card reader with head stop arrangement
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Timing wheel for card encoder
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Credit card reading apparatus with reliable optical path interrupt means
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Superconductor with improved persistence characteristics
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Credit card security system
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Automatic teller machine with entrance adapted to prevent access by foreign objects
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Jitter-free gear arrangement for equipment requiring precision mechanical movement
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