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Die große Enzyklopädie des mechanischen Rechnens

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Patent:GB305579


Patent:GB 305579
Title:Adding and subtracting apparatus
Date:07.02.1928
Place:
Country:Great Britain
Person:Herzstark, Samuel (P)
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 GB305579


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Aus der Patentschrift GB305579