Granted Patent
Utility
US 5,893,939 · App. 08/989,196
Air purifier and filter assembly therefor
Inventors:
William J. Rakocy, Johnson Hsu, Neville R. Glenn
Patented Case
View Patent ↗
Granted: Apr 13, 1999
Filed: Dec 11, 1997
Inventors
William J. Rakocy
Johnson Hsu
Neville R. Glenn
Assignee (at issue)
Holmes Products Corporation
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.