Granted Patent
Utility
US 6,323,880 · App. 08/936,801
Gray scale expression method and gray scale display device
Inventor:
Hachiro Yamada
Patented Case
View Patent ↗
Granted: Nov 27, 2001
Filed: Sep 24, 1997
Inventor
Hachiro Yamada
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.