US Patent 7637840 Planetary transmission, especially dual-clutch planetary transmission
Patent 7637840 was granted and assigned to ZF Friedrichshafen on December, 2009 by the United States Patent and Trademark Office.
Is a
Current Assignee
Date Filed
March 22, 2005
Date of Patent
December 29, 2009
Patent Application Number
10593381
Patent Jurisdiction
Patent Number
Patent Primary Examiner
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