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Die große Enzyklopädie des mechanischen Rechnens

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Patent:CA239449


Patent:CA 239449
Title:Calculating machine
Date:15.04.1924
Place:
Country:Canada
Person:Quentell, William Prehn (P)
Company:Quentell (P) Corp.
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Keywords:
Link to the patent office:
(without guarantee)
 CA239449


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