Granted Patent
Utility
US 4,200,514 · App. 05/969,240
Method and apparatus for the aligning and installation of wicket gate bushings in a unitized stay ring-discharge ring of a hydro-turbine machine
Inventor:
Robert G. Schaale
Patented Case
View Patent ↗
Granted: Apr 29, 1980
Filed: Dec 13, 1978
Inventor
Robert G. Schaale
Assignee (at issue)
Allis-Chalmers 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.