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Patent:US2266839


Patent:US 2266839
Title:Integrating Device
Date:23.12.1941
Place:
Country:USA
Person:R. A. Ackley
Company:
Internal Links:Planimeter
Keywords:
Link to the patent office:
(without guarantee)
 US2266839 (espacenet),  US2266839 (uspto)


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Aus der Patentschrift US2266839