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Patent:US886747


Patent:US 886747
Title:Ribbon controlling mechanism for adding machines
Date:05.05.1908
Place:Chicago
Country:USA
Person:Wetmore, Charles (P) & Niemann, Frederick (P)
Company:Comptograph Comp.
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Link to the patent office:
(without guarantee)
 US886747 (espacenet),  US886747 (uspto)


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