Granted Patent
Utility
US 5,203,673 · App. 07/823,532
Tip clearance control apparatus for a turbo-machine blade
Inventor:
David H. Evans
Patented Case
View Patent ↗
Granted: Apr 20, 1993
Filed: Jan 21, 1992
Inventor
David H. Evans
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.