Granted Patent
Utility
US 6,712,877 · App. 10/228,134
Oxygen concentrator system
Inventors:
Tuan Q. Cao, Gary Byrd, Lyle Berkenbosch, Craig Schledewitz
Patented Case
View Patent ↗
Granted: Mar 30, 2004
Filed: Aug 27, 2002
Inventors
Tuan Q. Cao
Gary Byrd
Lyle Berkenbosch
Craig Schledewitz
Assignee (at issue)
Litton Systems, Inc.
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.