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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US2278405


Patent:US 2278405
Title:Calculating machine casing
Date:31.03.1942
Place:Chicago
Country:USA
Person:Niemann, Frederick (P)
Company:Felt und Tarrant (P) Mfg. Comp.
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Link to the patent office:
(without guarantee)
 US2278405 (espacenet),  US2278405 (uspto)


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