Granted Patent
Utility
US 6,642,644 · App. 09/964,372
Shadow mask for color CRT having vertical slots
Inventors:
Sung Yeon Kim, Hyeon-Soo Hong
Patented Case
View Patent ↗
Granted: Nov 4, 2003
Filed: Sep 28, 2001
Inventors
Sung Yeon Kim
Hyeon-Soo Hong
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.