Granted Patent
Utility
US 6,649,952 · App. 09/750,915
Color filter
Inventor:
Atsumasa Sawada
Patented Case
View Patent ↗
Granted: Nov 18, 2003
Filed: Jan 2, 2001
Inventor
Atsumasa Sawada
Assignee (at issue)
NEC LCD Technologies, Ltd.
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.