Granted Patent
Utility
US 4,911,564 · App. 07/269,684
Protective bearing guard
Inventor:
Herbert R. Baker
Patented Case
View Patent ↗
Granted: Mar 27, 1990
Filed: Nov 10, 1988
Inventor
Herbert R. Baker
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.