Granted Patent
Utility
US 6,160,892 · App. 08/850,036
Active muffler
Inventor:
Istvan L. Ver
Patented Case
View Patent ↗
Granted: Dec 12, 2000
Filed: May 2, 1997
Inventor
Istvan L. Ver
Assignee (at issue)
BBN Corporation
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.