Granted Patent
Utility
US 6,488,744 · App. 09/809,841
Filter system
Inventor:
Mark Cartellone
Patented Case
View Patent ↗
Granted: Dec 3, 2002
Filed: Mar 19, 2001
Inventor
Mark Cartellone
Assignee (at issue)
HMI Industries, 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.