Granted Patent
Utility
US 6,764,534 · App. 10/354,275
Portable oxygen concentrator
Inventors:
Norman R. McCombs, Robert Casey, Michael A. Chimiak, Andrezj Klimaszewski
Patented Case
View Patent ↗
Granted: Jul 20, 2004
Filed: Jan 30, 2003
Inventors
Norman R. McCombs
Robert Casey
Michael A. Chimiak
Andrezj 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.