Granted Patent
Utility
US 5,335,628 · App. 08/118,388
Integrated boiler/fuel cell system
Inventor:
William R. Dunbar
Patented Case
View Patent ↗
Granted: Aug 9, 1994
Filed: Sep 3, 1993
Inventor
William R. Dunbar
Assignee (at issue)
Aqua-Chem, 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.