Granted Patent
Utility
US 6,427,690 · App. 09/420,826
Combined oxygen regulator and conservation device
Inventors:
Norman R. McCombs, James A. Alessi, Michael A. Chimiak, Andrzej Klimaszewski
Patented Case
View Patent ↗
Granted: Aug 6, 2002
Filed: Oct 19, 1999
Inventors
Norman R. McCombs
James A. Alessi
Michael A. Chimiak
Andrzej Klimaszewski
Assignee (at issue)
AirSep Corporation
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.