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Patent:US1934747


Patent:US 1934747
Title:Adding and subtracting machine
Date:14.11.1933
Place:Rockford und Wilmington, DE
Country:USA
Person:Sundstrand, Oscar (P)
Company:Sundstrand (P) Corp.
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Link to the patent office:
(without guarantee)
 US1934747 (espacenet),  US1934747 (uspto)


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