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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US1827890


Patent:US 1827890
Title:Calculating Machine
Date:20.10.1931
Place:
Country:USA
Person:Horton, Allen (P)
Company:Burroughs (P)
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US1827890 (espacenet),  US1827890 (uspto)


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Aus der Patentschrift US1827890