Granted Patent
Utility
US 6,686,682 · App. 10/134,490
Cathode in cathode ray tube
Inventor:
Byung Mook Weon
Patented Case
View Patent ↗
Granted: Feb 3, 2004
Filed: Apr 30, 2002
Inventor
Byung Mook Weon
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.