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Die große Enzyklopädie des mechanischen Rechnens

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Patent:FR403912


Patent:FR 403912
Title:Perfectionnements aux machines à calculer
Date:06.10.1909
Place:
Country:France
Person:Felt, Dorr E. (P)
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 FR403912


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