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Die große Enzyklopädie des mechanischen Rechnens

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Patent:GB215648


Patent:GB 215648
Title:Improvements in circular calculators
Date:15.05.1924
Place:
Country:Great Britain
Person:Harold Fowler, William Henry Fowler
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 GB215648


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Aus der Patentschrift GB215648