Granted Patent
Utility
US 6,823,748 · App. 10/122,154
Active pulsation cancellation device for diesel particulate sampling systems
Inventors:
William Martin Silvis, Norbert Kreft, Wolfgang Schindler, Gerald Marek
Patented Case
View Patent ↗
Granted: Nov 30, 2004
Filed: Apr 12, 2002
Inventors
William Martin Silvis
Norbert Kreft
Wolfgang Schindler
Gerald Marek
Assignee (at issue)
AVL North America, 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.