Granted Patent
Utility
US 6,039,538 · App. 09/005,551
Multi-blade rotor for a helicopter
Inventor:
Horst Bansemir
Patented Case
View Patent ↗
Granted: Mar 21, 2000
Filed: Jan 12, 1998
Inventor
Horst Bansemir
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.