Granted Patent
Utility
US 4,249,646 · App. 06/012,991
Drum brake assembly with non-servo and duo-servo characteristics
Inventor:
James K. Roberts
Patented Case
View Patent ↗
Granted: Feb 10, 1981
Filed: Feb 21, 1979
Inventor
James K. Roberts
Assignee (at issue)
Bendix Limited
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.