Granted Patent
Utility
US 4,410,830 · App. 06/239,204
Vacuum fluorescent display device with substrate including a metal plate
Inventor:
Richard DuBois
Patented Case
View Patent ↗
Granted: Oct 18, 1983
Filed: Mar 3, 1981
Inventor
Richard DuBois
Assignee (at issue)
Edison International 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.