Granted Patent
Utility
US 4,991,697 · App. 07/468,007
Disc brake pad
Inventors:
Alan R. Hummel, Ernest R. Welch
Patented Case
View Patent ↗
Granted: Feb 12, 1991
Filed: Jan 16, 1990
Inventors
Alan R. Hummel
Ernest R. Welch
Assignee (at issue)
Abex 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.