Granted Patent
Utility
US 6,693,398 · App. 10/244,398
Electron gun for CRT
Inventor:
Sung Ho Cho
Patented Case
View Patent ↗
Granted: Feb 17, 2004
Filed: Sep 17, 2002
Inventor
Sung Ho Cho
Assignee (at issue)
LG. Philips Displays Korea 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.