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Patent:US2043221


Patent:US 2043221
Title:Calculating machine
Date:09.06.1936
Place:Wallington und London
Country:USA
Person:Ball, William (P)
Company:British Adding and Calculating Machines Ltd.
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US2043221 (espacenet),  US2043221 (uspto)


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