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Die große Enzyklopädie des mechanischen Rechnens

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Patent:GB752591


Patent:GB 752591
Title:Improvements in or relating to calculating machines
Date:11.07.1956
Place:
Country:Great Britain
Person:
Company:Felt und Tarrant (P)
Internal Links:Comptometer
Keywords:
Link to the patent office:
(without guarantee)
 GB752591


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Aus der Patentschrift GB752591