Granted Patent
Utility
US 6,805,122 · App. 09/952,763
Oxygen conserving device utilizing a radial multi-stage compressor for high-pressure mobile storage
Inventors:
Joseph B. Richey, II, Gerald Goertzen
Patented Case
View Patent ↗
Granted: Oct 19, 2004
Filed: Sep 14, 2001
Inventors
Joseph B. Richey, II
Gerald Goertzen
Assignee (at issue)
INVACARE 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.