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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US1947620


Patent:US 1947620
Title:Calculating machine
Date:20.02.1934
Place:Steglitz und Zella-Mehlis
Country:USA
Person:Schlüns, Carl
Company:Mercedes (P) Büromaschinen-Werke AG
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Link to the patent office:
(without guarantee)
 US1947620 (espacenet),  US1947620 (uspto)


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