Granted Patent
Utility
US 6,346,341 · App. 09/216,660
Air delivery system with volume-changeable plenum for metal-air battery
Inventor:
John Witzigreuter
Patented Case
View Patent ↗
Granted: Feb 12, 2002
Filed: Dec 18, 1998
Inventor
John Witzigreuter
Assignee (at issue)
AER Energy Resources, 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.