Granted Patent
Utility
US 4,371,631 · App. 06/289,142
Backing plate composition for brake shoes
Inventor:
Walter B. Peters
Patented Case
View Patent ↗
Granted: Feb 1, 1983
Filed: Aug 3, 1981
Inventor
Walter B. Peters
Assignee (at issue)
Manville Service 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.