Granted Patent
Utility
US 6,497,620 · App. 09/658,098
Coupling assembly for agricultural implements
Inventors:
Andreas Lohmuller, Andreas Sarfert, Reinhold Walter, Eberhard Wilks
Patented Case
View Patent ↗
Granted: Dec 24, 2002
Filed: Sep 8, 2000
Inventors
Andreas Lohmuller
Andreas Sarfert
Reinhold Walter
Eberhard Wilks
Assignee (at issue)
GKN Walterscheid GmbH
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.