Granted Patent
Utility
US 4,558,529 · App. 06/698,347
Display element with back lighting
Inventors:
Kwangling Chang, Pankaj J. Dave
Patented Case
View Patent ↗
Granted: Dec 17, 1985
Filed: Feb 4, 1985
Inventors
Kwangling Chang
Pankaj J. Dave
Assignee (at issue)
NEI Canada Limited
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.