Granted Patent
Utility
US 4,528,480 · App. 06/454,008
AC Drive type electroluminescent display device
Inventors:
Takashi Unagami, Bunjiro Tsujiyama
Patented Case
View Patent ↗
Granted: Jul 9, 1985
Filed: Dec 28, 1982
Inventors
Takashi Unagami
Bunjiro Tsujiyama
Assignee (at issue)
NIPPON TELEGRAPH AND TELEPHONE 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.