Granted Patent
Utility
US 6,201,223 · App. 09/242,584
Humidification control unit and method of manufacturing same
Inventor:
Kazufuku Nitta
Patented Case
View Patent ↗
Granted: Mar 13, 2001
Filed: Aug 23, 1999
Inventor
Kazufuku Nitta
Assignee (at issue)
Respironics, 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.