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Die große Enzyklopädie des mechanischen Rechnens

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Patent:GB307513


Patent:GB 307513
Title:Improvements in or relating to calculating devices
Date:12.12.1929
Place:
Country:Great Britain
Person:
Company:Askania (P) Werke Ag
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 GB307513


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Aus der Patentschrift GB307513