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Die große Enzyklopädie des mechanischen Rechnens

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Patent:GB265136


Patent:GB 265136
Title:An improved keyboard for calculating machines
Date:26.08.1927
Place:
Country:Great Britain
Person:
Company:Burroughs (P) Adding Machine Co
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 GB265136


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Aus der Patentschrift GB265136