Granted Patent
Utility
US 4,880,189 · App. 07/190,017
Device for closing and opening in the leading edge of a wing
Inventor:
Roger A. Day
Patented Case
View Patent ↗
Granted: Nov 14, 1989
Filed: Sep 4, 1988
Inventor
Roger A. Day
Assignee (at issue)
British Aerospace Public Limited Co.
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.