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Die große Enzyklopädie des mechanischen Rechnens

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Patent:GB680131


Patent:GB 680131
Title:Improvements in or relating to calculating apparatus
Date:01.10.1952
Place:
Country:Great Britain
Person:John Reginald Malby und Patrick Rolland Maciver
Company:
Internal Links:
Keywords:
Link to the patent office:
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 GB680131


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Aus der Patentschrift GB680131