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Die große Enzyklopädie des mechanischen Rechnens

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Patent:DE392573


Patent:DE 392573
Title:Rechenmaschine
Date:24.03.1924
Place:
Country:Germany
Person:Quentell, William Prehn (P)
Company:Quentell (P) Corp
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Link to the patent office:
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 DE392573


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Aus der Patentschrift DE392573