Granted Patent
Utility
US 6,444,006 · App. 09/573,747
High temperature composite ceramic filter
Inventors:
William C. Haberkamp, Thomas M. Yonushonis
Patented Case
View Patent ↗
Granted: Sep 3, 2002
Filed: May 18, 2000
Inventors
William C. Haberkamp
Thomas M. Yonushonis
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.