Granted Patent
Utility
US 4,520,039 · App. 06/422,155
Compositionally varied materials and method for synthesizing the materials
Inventor:
Stanford R. Ovshinsky
Patented Case
View Patent ↗
Granted: May 28, 1985
Filed: Sep 23, 1982
Inventor
Stanford R. Ovshinsky
Assignee (at issue)
Sovonics Solar Systems
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.