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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US1239598


Patent:US 1239598
Title:Calculating Machine
Date:11.09.1917
Place:
Country:USA
Person:F. O. Heuser
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US1239598 (espacenet),  US1239598 (uspto)


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Aus der Patentschrift US1239598