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Patent:US2139131


Patent:US 2139131
Title:Calculating Machine
Date:06.12.1938
Place:
Country:USA
Person:Muller, Robert (P)
Company:Burroughs (P)
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US2139131 (espacenet),  US2139131 (uspto)


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Aus der Patentschrift US2139131