Granted Patent
Utility
US 5,554,454 · App. 08/392,545
Solid oxide fuel cell stack
Inventors:
Frederick J. Gardner, Michael J. Day, Nigel Brandon, John B Brownell
Patented Case
View Patent ↗
Granted: Sep 10, 1996
Filed: Feb 16, 1995
Inventors
Frederick J. Gardner
Michael J. Day
Nigel Brandon
John B Brownell
Assignee (at issue)
ROLLS-ROYCE plc
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.