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Patent:US1027511


Patent:US 1027511
Title:Adding and subtracting machine
Date:28.05.1912
Place:Detroit
Country:USA
Person:Vincent, Jesse Gurney (P)
Company:Burroughs (P) Adding Machine Comp.
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Link to the patent office:
(without guarantee)
 US1027511 (espacenet),  US1027511 (uspto)


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