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Patent:GB343476


Patent:GB 343476
Title:Improvements in and relating to calculating machines
Date:16.02.1931
Place:
Country:Great Britain
Person:Ball, William (P), Fitz, Richard (P) und Simson, Donald Petrie (P)
Company:
Internal Links:
Keywords:
Link to the patent office:
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 GB343476


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Aus der Patentschrift GB343476