Granted Patent
Utility
US 6,149,141 · App. 09/216,039
Portable evaporative humidifier apparatus
Inventors:
Walter Birdsell, John Longan
Patented Case
View Patent ↗
Granted: Nov 21, 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.