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Patent:US1380754


Patent:US 1380754
Title:Integraph and Differentiator
Date:07.06.1921
Place:
Country:USA
Person:J. P. Van Bogaert
Company:
Internal Links:Planimeter, Integraph
Keywords:
Link to the patent office:
(without guarantee)
 US1380754 (espacenet),  US1380754 (uspto)


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Aus der Patentschrift US1380754