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Patent:US1180556


Patent:US 1180556
Title:Cipher cut-out for adding-machines
Date:25.04.1916
Place:Chicago
Country:USA
Person:Charles P. Wetmore
Company:Comptograph Comp.
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Keywords:
Link to the patent office:
(without guarantee)
 US1180556 (espacenet),  US1180556 (uspto)


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