Granted Patent
Utility
US 5,159,998 · App. 07/739,148
Unispring drum brake assembly
Inventors:
Douglas M. Copp, Robert W. Hyde, Frank W. Brooks, Sr., Gary G. Holliday, Michael W. Fanelli
Patented Case
View Patent ↗
Granted: Nov 3, 1992
Filed: Aug 2, 1991
Inventors
Douglas M. Copp
Robert W. Hyde
Frank W. Brooks, Sr.
Gary G. Holliday
Michael W. Fanelli
Assignee (at issue)
General Motors 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.