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US2090920A
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Device for the adjustment of members especially of the types in machines operating with punched cards
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GB404799A
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Improvements in sorting machines for punched record cards and the like
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US1799186A
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Apparatus for sorting punched cards with the help of feeler pins
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US1591005A
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Apparatus for the mechanical assembling of statistical cards bearing corresponding data
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DE411842C
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Sensing device for devices interacting with punch cards, e.g. B. statistical machines
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US1564913A
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Mechanism for moving and adjusting forms in typewriters
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US1640381A
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Calculating machine
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DE406093C
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Device on typewriters and similar machines for setting the correct starting position of forms
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