Granted Patent
Utility
US 6,531,812 · App. 09/731,845
Shadow mask for flat cathode ray tube
Inventor:
Sung Woo Ko
Patented Case
View Patent ↗
Granted: Mar 11, 2003
Filed: Dec 8, 2000
Inventor
Sung Woo Ko
Assignee (at issue)
LG ELECTRONICS INC.
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.