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Die große Enzyklopädie des mechanischen Rechnens

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  • Patent:DE181138 01.03.1906 Hanson, Hans (P) : Schreib- und Rechenmaschine mit besonderen Rechentasten und Ziffertypentasten
  • Patent:GB190605557 07.02.1907 Hanson, Hans (P) : Improvements in or relating to Calculating Apparatus applicable to Typewriters
  • Patent:US1278812 10.09.1918 Hanson, Hans (P) Underwood (P) Computing Machine Co : Combined typewriting and computing machine
  • Patent:US1279687 24.09.1918 Hanson, Hans (P) Underwood (P) Computing Machine Com. : Combined type-writing and computing machine
  • Patent:US1279688 24.09.1918 Hanson, Hans (P) Underwood (P) Computing Machine Comp. : Combined type-writing and computing machine
  • Patent:US1279861 24.09.1918 Hanson, Hans (P) Underwood (P) Computing Machine Com. : Combined type-writing and computing machine
  • Patent:US1279863 24.09.1918 Hanson, Hans (P) Underwood (P) Computing Machine Comp. : Combined type-writing and computing machine
  • Patent:US1282820 29.10.1918 Hanson, Hans (P) Underwood (P) Computing Machine Com. : Combined type-writing and computing machine
  • Patent:US1291859 21.01.1919 Hanson, Hans (P) Underwood (P) Computing Machine Comp. : Combined type-writing-and computing machine
  • Patent:US1416464 16.05.1922 Hanson, Hans (P) Underwood (P) Computing Machine Comp. : Combined typewriting and computing machine
  • Patent:US816319 27.03.1906 Hanson, Hans (P) : Calculating machine and type-writer attachment
  • Patent:US876959 21.01.1908 Hanson, Hans (P) : Two way full stroke device for key levers
  • Patent:US905421 01.12.1908 Hanson, Hans (P) : Combined type-writing and computing machine
  • Patent:US905422 01.12.1908 Hanson, Hans (P) : Combined type-writing and computing machine

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