Granted Patent
Utility
US 6,168,383 · App. 09/067,916
Rotor blade for rotary-wing aircraft
Inventor:
Toshio Shimizu
Patented Case
View Patent ↗
Granted: Jan 2, 2001
Filed: Apr 29, 1998
Inventor
Toshio Shimizu
Assignee (at issue)
Fuji Jukogyo Kabushiki Kaisha
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.