Granted Patent
Utility
US 5,724,849 · App. 08/741,944
Process for forming a tube for use in a sound attenuating muffler
Inventor:
Norman J. Frossard, Jr.
Patented Case
View Patent ↗
Granted: Mar 10, 1998
Filed: Oct 31, 1996
Inventor
Norman J. Frossard, Jr.
Assignee (at issue)
Tanneco Automotive 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.