Granted Patent
Utility
US 6,081,257 · App. 08/802,421
Control stick rotatably positionable in three axes
Inventor:
Stegfried Zeller
Patented Case
View Patent ↗
Granted: Jun 27, 2000
Filed: Feb 18, 1997
Inventor
Stegfried Zeller
Assignee (at issue)
Eurocopter Deutschland 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.