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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US1935851


Patent:US 1935851
Title:Calculating Machine
Date:21.11.1933
Place:
Country:USA
Person:G. Lerch
Company:Marchant (P)
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US1935851 (espacenet),  US1935851 (uspto)


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Aus der Patentschrift US1935851