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Die große Enzyklopädie des mechanischen Rechnens

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Patent:DE306655


Patent:DE 306655
Title:Rechenmaschine
Date:04.04.1914
Place:Brooklyn, New York, USA
Country:Germany
Person:Underwood, John Thomas (P)
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 DE306655


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