Granted Patent
Utility
US 6,484,721 · App. 09/893,178
Pneumatic oxygen conserving device
Inventor:
Peter L. Bliss
Patented Case
View Patent ↗
Granted: Nov 26, 2002
Filed: Jun 27, 2001
Inventor
Peter L. Bliss
Assignee (at issue)
Chad Therapeutics, 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.