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Patent:US1621394


Patent:US 1621394
Title:Mechanical integrating device and application of the same, chiefly to a navigation course recorder
Date:15.03.1927
Place:Mustapha, Algeria
Country:USA
Person:Charles Frederic Jean Marie Bertin
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US1621394 (espacenet),  US1621394 (uspto)


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