Granted Patent
Utility
US 4,338,267 · App. 06/207,502
Medical gas humidifier with audible pressure relief valve and method of use
Inventors:
Arduino E. Riuli, Robert W. Anastasia, Bernard F. Kopacz
Patented Case
View Patent ↗
Granted: Jul 6, 1982
Filed: Nov 17, 1980
Inventors
Arduino E. Riuli
Robert W. Anastasia
Bernard F. Kopacz
Assignee (at issue)
BECTON, DICKINSON AND COMPANY
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.