Granted Patent
Utility
US 6,511,531 · App. 09/769,820
Room air filtering and freshening device
Inventor:
Mark Cartellone
Patented Case
View Patent ↗
Granted: Jan 28, 2003
Filed: Jan 26, 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.