Granted Patent
Utility
US 6,446,630 · App. 09/499,201
Cylinder filling medical oxygen concentrator
Inventor:
Oliver E. Todd, Jr.
Patented Case
View Patent ↗
Granted: Sep 10, 2002
Filed: Feb 7, 2000
Inventor
Oliver E. Todd, Jr.
Assignee (at issue)
Sunrise Medical HHG, 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.