Granted Patent
Utility
US 5,847,501 · App. 08/740,998
Electron guns for color picture tube with electrostatic focusing lenses for operating in vertical and horizontal directions
Inventor:
Sung-gi Ahn
Patented Case
View Patent ↗
Granted: Dec 8, 1998
Filed: Nov 5, 1996
Inventor
Sung-gi Ahn
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.