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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US2346601


Patent:US 2346601
Title:Calculating machine
Date:11.04.1944
Place:Chicago
Country:USA
Person:Niemann, Frederick (P)
Company:Felt und Tarrant (P) Mfg. Comp.
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US2346601 (espacenet),  US2346601 (uspto)


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