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Die große Enzyklopädie des mechanischen Rechnens

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Patent:CH306412


Patent:CH 306412
Title:Machine à calculer.
Date:15.04.1955
Place:USA
Country:Switzerland
Person:
Company:Underwood (P)
Internal Links:
Keywords:
Link to the patent office:
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 CH306412


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Aus der Patentschrift CH306412