Granted Patent
Utility
US 6,241,056 · App. 09/222,211
Composite brake drum
Inventors:
Jerry Cullen, Ross S. Hill, James A. Wieland
Patented Case
View Patent ↗
Granted: Jun 5, 2001
Filed: Dec 29, 1998
Inventors
Jerry Cullen
Ross S. Hill
James A. Wieland
Assignee (at issue)
Hayes Lemmerz International, Inc.
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.