Granted Patent
Utility
US 4,337,407 · App. 06/144,815
Insulated strand brushes
Inventor:
George T. Hummert
Patented Case
View Patent ↗
Granted: Jun 29, 1982
Filed: Apr 29, 1980
Inventor
George T. Hummert
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.