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Patent:US2228068


Patent:US 2228068
Title:Integrating Apparatus
Date:07.01.1941
Place:
Country:USA
Person:E. J. White
Company:
Internal Links:Planimeter
Keywords:
Link to the patent office:
(without guarantee)
 US2228068 (espacenet),  US2228068 (uspto)


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Aus der Patentschrift US2228068