Granted Patent
Utility
US 4,696,621 · App. 06/856,986
Aerofoil section members for gas turbine engines
Inventors:
Martin Hamblett, Duncan J. Livsey
Patented Case
View Patent ↗
Granted: Sep 29, 1987
Filed: Apr 29, 1986
Inventors
Martin Hamblett
Duncan J. Livsey
Assignee (at issue)
Rolls-Royce Corporation
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.