Granted Patent
Utility
US 4,240,713 · App. 05/958,903
Electrode barrier layer for hydrogen-colored electrochromic displays
Inventor:
Marshall Leibowitz
Patented Case
View Patent ↗
Granted: Dec 23, 1980
Filed: Nov 8, 1978
Inventor
Marshall Leibowitz
Assignee (at issue)
Timex 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.