Granted Patent
Utility
US 5,912,441 · App. 08/888,188
Absorption/reflection exhaust muffler
Inventor:
Siegfried Worner
Patented Case
View Patent ↗
Granted: Jun 15, 1999
Filed: Jul 3, 1997
Inventor
Siegfried Worner
Assignee (at issue)
J. Eberspaecher GmbH & Co. KG
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.