Granted Patent
Utility
US 4,954,182 · App. 07/301,916
Multiple cell photoresponsive amorphous photo voltaic devices including graded band gaps
Inventors:
Stanford R. Ovshinsky, David Adler
Patented Case
View Patent ↗
Granted: Sep 4, 1990
Filed: Mar 13, 1989
Inventors
Stanford R. Ovshinsky
David Adler
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.