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Die große Enzyklopädie des mechanischen Rechnens

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Patent:GB281300


Patent:GB 281300
Title:An improved device for facilitating arithmetical calculations
Date:25.03.1929
Place:Vienna
Country:Great Britain
Person:Karl Huppert Marcell Klein Arpad Herczka Alexander Herczka Oskar Uxa Auguste Herczka
Company:
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 GB281300


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