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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US3257658


Patent:US 3257658
Title:Calculating Machines
Date:21.06.1966
Place:
Country:USA
Person:George Lloyd John
Company:Bell Punch (P)
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US3257658 (espacenet),  US3257658 (uspto)


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Aus der Patentschrift US3257658