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Die große Enzyklopädie des mechanischen Rechnens

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Patent:GB211137


Patent:GB 211137
Title:Improvements in or relating to calculating machines
Date:06.05.1925
Place:
Country:Great Britain
Person:
Company:Collett and Co As O
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 GB211137


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Aus der Patentschrift GB211137