GB795003A
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Improvements in or relating to accounting machines
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GB785614A
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Numeral storer for calculating, book-keeping or the like machines
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GB790847A
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Improvements in electric totalisers
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GB785285A
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Improvements in or relating to calculating and book keeping machines
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DE1000618B
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Electric sum pictures
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DE928128C
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Adjustment control device
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DE958063C
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Decimal point indicator
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DE934314C
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Visual display for booking machines, especially those with electro-mechanical controls
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DE901965C
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Control device for a decimal tabulator on electrically powered typewriters
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DE919740C
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Computing device for an electrically driven writing unit
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DE912578C
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Drive for selector rail systems on electrical typewriters, accounting machines and calculating machines
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