Granted Patent
Utility
US 4,834,086 · App. 07/148,693
Pressure-regulating device for the second stage of reduction of an air breathing apparatus
Inventor:
Giovanni Garofalo
Patented Case
View Patent ↗
Granted: May 30, 1989
Filed: Jan 26, 1988
Inventor
Giovanni Garofalo
Assignee (at issue)
AMF Mares S.p.A.
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.