Granted Patent
Utility
US 4,303,601 · App. 06/135,555
Ventilator humidifier
Inventors:
Daniel Grimm, John M. Unger, Robert A. Virag
Patented Case
View Patent ↗
Granted: Dec 1, 1981
Filed: Mar 31, 1980
Inventors
Daniel Grimm
John M. Unger
Robert A. Virag
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.