Granted Patent
Utility
US 6,820,706 · App. 10/170,141
Method and system for hydrogen powered internal combustion engine
Inventors:
Stanford R. Ovshinsky, Robert C. Stempel, Richard O. Geiss, Bruce Webster, Ian Kinoshta
Patented Case
View Patent ↗
Granted: Nov 23, 2004
Filed: Jun 12, 2002
Inventors
Stanford R. Ovshinsky
Robert C. Stempel
Richard O. Geiss
Bruce Webster
Ian Kinoshta
Assignee (at issue)
Energy Conversion Devices, 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.