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Electro-mechanical retrieval device for randomly filed materials
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Console for random access filing equipment or the like having push button display
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Information retrieval apparatus
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Card transfer device for information retrieval systems
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Apparatus for the selection of coded elements filed at random
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Apparatus for the selection of coded elements filed at random
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Punch mechanism for random card filing and automatic retrieval equipment
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Apparatus for the selection of coded elements filed at random
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Coded element and means for use therewith
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Signal translating equipment
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Data processing equipment
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