Granted Patent
Utility
US 5,229,557 · App. 07/706,169
Rigidified muffler assembly
Inventors:
James R. Allman, Richard C. Wilcox, Thomas J. Rohm
Patented Case
View Patent ↗
Granted: Jul 20, 1993
Filed: May 28, 1991
Inventors
James R. Allman
Richard C. Wilcox
Thomas J. Rohm
Assignee (at issue)
Arvin Industries, 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.