Granted Patent
Utility
US 4,826,331 · App. 07/168,860
Protective bearings guard
Inventor:
Herbert R. Baker
Patented Case
View Patent ↗
Granted: May 2, 1989
Filed: Mar 16, 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.