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Die große Enzyklopädie des mechanischen Rechnens

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Patent:GB218712


Patent:GB 218712
Title:Improvements in and relating to calculators
Date:15.07.1924
Place:
Country:Great Britain
Person:Harry Skeet Broom
Company:Broom and Wade Ltd
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 GB218712


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Aus der Patentschrift GB218712