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Patent:US1128546


Patent:US 1128546
Title:Adding Machine
Date:16.02.1915
Place:San Antonio, Texas, USA
Country:USA
Person:Sweet, Welcome F; Tideman, Sven
Company:Simplex Adding Machine Company
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Keywords:
Link to the patent office:
(without guarantee)
 US1128546 (espacenet),  US1128546 (uspto)


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