Granted Patent
Utility
US 4,498,156 · App. 06/305,248
Electrochromic nonvolatile memory device
Inventor:
Frank A. Pizzarello
Patented Case
View Patent ↗
Granted: Feb 5, 1985
Filed: Sep 24, 1981
Inventor
Frank A. Pizzarello
Assignee (at issue)
Rockwell International Corporation
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.