Granted Patent
Utility
US 6,131,889 · App. 09/216,453
Evaporative humidifier with liquid distribution system
Inventors:
Walter Birdsell, John Longan
Patented Case
View Patent ↗
Granted: Oct 17, 2000
Filed: Dec 18, 1998
Inventors
Walter Birdsell
John Longan
Assignee (at issue)
Honeywell Limited
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.