Granted Patent
Utility
US 5,678,541 · App. 08/616,223
Breathing regulator apparatus having automatic flow control
Inventor:
Dean R. Garraffa
Patented Case
View Patent ↗
Granted: Oct 21, 1997
Filed: Mar 15, 1996
Inventor
Dean R. Garraffa
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.