GB609336A
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Improvements in or relating to record controlled statistical machines
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GB482668A
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Improvements in or relating to machines for punching statistical record cards
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GB477039A
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Improvements in or relating to means for sensing record perforations
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GB480099A
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Improvements in or relating to apparatus for indicating the nature of the sequence of record cards
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GB398223A
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Improvements in or relating to record card controlled statistical machines
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GB387791A
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Improvements in or relating to perforated records for controlling statistical machines
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GB365369A
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Improvements in or relating to toy building units
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GB369691A
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Improvements in or relating to record card controlled tabulating machines
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GB368766A
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Improvements in or relating to methods of and means for controlling the printing units of a perforated card operated tabulating machine
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GB365689A
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Improvements in or relating to record card controlled listing or tabulating or like statistical machines
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GB362770A
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Improvements in or relating to statistical calculating and like machines controlled by mechanical records
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GB264609A
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Improvements in and relating to statistical, calculating and like machines
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GB243099A
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Improvements in and relating to devices, such as cards, suitable for recording statistical data
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