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Die große Enzyklopädie des mechanischen Rechnens

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Patent:DE902192


Patent:DE 902192
Title:Rechenhilfsmittel
Date:21.01.1954
Place:Bischofswiesen b. Berchtesgaden
Country:Germany
Person:Friedrich Zwernemann
Company:
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Keywords:
Link to the patent office:
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 DE902192


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