Granted Patent
Utility
US 4,854,423 · App. 07/224,096
Hydraulic disc brake drum-in-hat parking brake assembly
Inventors:
Anthony C. Evans, Larry L. Last
Patented Case
View Patent ↗
Granted: Aug 8, 1989
Filed: Jul 26, 1988
Inventors
Anthony C. Evans
Larry L. Last
Assignee (at issue)
KELSEY-HAYES-COMPANY
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.