Granted Patent
Utility
US 4,689,645 · App. 06/853,269
Current control device
Inventors:
Stanford R. Ovshinsky, Masatsugu Izu
Patented Case
View Patent ↗
Granted: Aug 25, 1987
Filed: Apr 17, 1986
Inventors
Stanford R. Ovshinsky
Masatsugu Izu
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.