Granted Patent
Utility
US 6,578,830 · App. 09/851,139
Gas-fired humidifier
Inventor:
Robert John Watts
Patented Case
View Patent ↗
Granted: Jun 17, 2003
Filed: May 9, 2001
Inventor
Robert John Watts
Assignee (at issue)
Eaton-Williams Group 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.