Granted Patent
Utility
US 6,702,880 · App. 10/150,299
Inlet silencer/filter for an oxygen concentrator
Inventors:
Keith A. Roberts, Chaouki A. Khamis
Patented Case
View Patent ↗
Granted: Mar 9, 2004
Filed: May 17, 2002
Inventors
Keith A. Roberts
Chaouki A. Khamis
Assignee (at issue)
Porous Media 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.