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Die große Enzyklopädie des mechanischen Rechnens

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Patent:GB313157


Patent:GB 313157
Title:Improvements in or relating to calculating devices
Date:15.10.1930
Place:
Country:Great Britain
Person:
Company:Askania (P) Werke AG
Internal Links:Planimeter
Keywords:
Link to the patent office:
(without guarantee)
 GB313157


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Aus der Patentschrift GB313157