Granted Patent
Utility
US 4,987,555 · App. 07/277,833
Turbine blade shroud clearance monitor
Inventor:
Michael Twerdochlib
Patented Case
View Patent ↗
Granted: Jan 22, 1991
Filed: Nov 30, 1988
Inventor
Michael Twerdochlib
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.