Granted Patent
Utility
US 4,433,830 · App. 06/327,152
Lifting system for a turbine disc
Inventor:
Ira J. Campbell
Patented Case
View Patent ↗
Granted: Feb 28, 1984
Filed: Dec 3, 1981
Inventor
Ira J. Campbell
Assignee (at issue)
Westinghouse Electric Company LLC
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.