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Die große Enzyklopädie des mechanischen Rechnens

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Patent:GB143559


Patent:GB 143559
Title:Improvements in or relating to calculating machines
Date:23.12.1920
Place:
Country:Great Britain
Person:Trinks, Franz (P)
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 GB143559


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Aus der Patentschrift GB143559