Granted Patent
Utility
US 4,795,391 · App. 07/067,676
Means and method of forming aligned apertures in electron guns
Inventors:
Allen P. Blacker, Khem Garewal
Patented Case
View Patent ↗
Granted: Jan 3, 1989
Filed: Jun 26, 1987
Inventors
Allen P. Blacker
Khem Garewal
Assignee (at issue)
Zenith Electronics LLC
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.