Granted Patent
Utility
US 6,072,880 · App. 09/032,326
Modular active silencer with port dish
Inventors:
J. Clay Shipps, Charles Renz
Patented Case
View Patent ↗
Granted: Jun 6, 2000
Filed: Feb 27, 1998
Inventors
J. Clay Shipps
Charles Renz
Assignee (at issue)
Tenneco 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.