Granted Patent
Utility
US 6,669,913 · App. 09/522,152
Combination catalytic converter and filter
Inventor:
William C. Haberkamp
Patented Case
View Patent ↗
Granted: Dec 30, 2003
Filed: Mar 9, 2000
Inventor
William C. Haberkamp
Assignee (at issue)
Fleetguard, 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.