Granted Patent
Utility
US 5,990,630 · App. 09/003,162
Method for controlling surface discharge alternating current plasma display panel with drivers periodically changing duty factor of data pulses
Inventor:
Tadashi Nakamura
Patented Case
View Patent ↗
Granted: Nov 23, 1999
Filed: Jan 6, 1998
Inventor
Tadashi Nakamura
Assignee (at issue)
NEC 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.