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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US1986875


Patent:US 1986875
Title:Calculating Machine
Date:08.01.1935
Place:
Country:USA
Person:Avery, Harold (P)
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US1986875 (espacenet),  US1986875 (uspto)


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Aus der Patentschrift US1986875