Granted Patent
Utility
US 4,489,469 · App. 06/485,881
Process for the production of gas turbine engine rotors and stators
Inventor:
Robert T. Hall, II
Patented Case
View Patent ↗
Granted: Dec 25, 1984
Filed: Apr 18, 1983
Inventor
Robert T. Hall, II
Assignee (at issue)
WILLIAMS INTERNATIONAL CO., L.L.C.
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.