Granted Patent
Utility
US 6,690,439 · App. 10/025,766
Manufacturing method of cholesteric liquid crystal color filter
Inventors:
Ji Young Ahn, Jong-Weon Moon
Patented Case
View Patent ↗
Granted: Feb 10, 2004
Filed: Dec 26, 2001
Inventors
Ji Young Ahn
Jong-Weon Moon
Assignee (at issue)
LG Philips LCD Co., 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.