Granted Patent
Utility
US 4,441,027 · App. 06/367,641
Liquid level controller for a respiratory gas humidifier device
Inventors:
Gerry Dean Richardson, Joseph A. Cairo
Patented Case
View Patent ↗
Granted: Apr 3, 1984
Filed: Apr 12, 1982
Inventors
Gerry Dean Richardson
Joseph A. Cairo
Assignee (at issue)
Baxter Travenol Laboratories, 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.