Granted Patent
Utility
US 6,006,749 · App. 09/083,084
Regulating membrane for a breathing apparatus and a method of making same
Inventor:
Roberto Semeia
Patented Case
View Patent ↗
Granted: Dec 28, 1999
Filed: May 22, 1998
Inventor
Roberto Semeia
Assignee (at issue)
Scubapro Europe S.R.L.
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.