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Patent:US1131620


Patent:US 1131620
Title:Adding machine
Date:09.03.1915
Place:Los Angeles und Detroit
Country:USA
Person:Swalm, William E. (P)
Company:Burroughs (P) Adding Machine Comp.
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US1131620 (espacenet),  US1131620 (uspto)


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