Granted Patent
Utility
US 6,779,628 · App. 10/328,692
Device for producing an overtone-rich sporty exhaust sound
Inventors:
Bernd Fuhrmann, Friedrich Bielert
Patented Case
View Patent ↗
Granted: Aug 24, 2004
Filed: Dec 24, 2002
Inventors
Bernd Fuhrmann
Friedrich Bielert
Assignee (at issue)
Heinrich Gillet GmbH
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.