Granted Patent
Utility
US 4,553,064 · App. 06/527,724
Dual-mode electron gun with improved shadow grid arrangement
Inventor:
Kurt Amboss
Patented Case
View Patent ↗
Granted: Nov 12, 1985
Filed: Aug 30, 1983
Inventor
Kurt Amboss
Assignee (at issue)
Hughes Aircraft Company
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.