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DE927773C
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Scanning device for punched cards
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US2569879A
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Flexible connection box for tabulators
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GB635095A
|
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Improvements in or relating to machines for verifying perforated record cards
|
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GB619144A
|
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Improvements in devices for automatically comparing numbers in statistical machines
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GB618892A
|
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Improvements in devices for automatically comparing numbers in statistical machines
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GB620155A
|
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Improvements in or relating to perforated card controlled machines particularly tabulating machines
|
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GB613089A
|
|
Improvements in electro-magnetic relays
|
|
DE920038C
|
|
Terminal box with flexible connecting wires for punched card tabulation machines
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CA538352A
|
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Tabulating record controlled flexible connecting device
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