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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US3147915


Patent:US 3147915
Title:Calculator
Date:08.09.1964
Place:
Country:USA
Person:Cresswell
Company:
Internal Links:Rechenwalze
Keywords:
Link to the patent office:
(without guarantee)
 US3147915 (espacenet),  US3147915 (uspto)


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Aus der Patentschrift US3147915

simple cylindrical slide rule like device