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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US1928125


Patent:US 1928125
Title:Calculating Machine
Date:26.09.1933
Place:
Country:USA
Person:Friden, Carl Mauritz Fredrick (P)
Company:Marchant (P)
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US1928125 (espacenet),  US1928125 (uspto)


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Aus der Patentschrift US1928125