Granted Patent
Utility
US 4,267,476 · App. 06/051,914
Metal-solid lubricant brushes for high-current rotating electrical machinery
Inventor:
Pang K. Lee
Patented Case
View Patent ↗
Granted: May 12, 1981
Filed: Jun 25, 1979
Inventor
Pang K. Lee
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.