Granted Patent
Utility
US 4,891,549 · App. 07/052,714
Electron gun system
Inventors:
Karl Kniesser, Walter Kornaker, Bernhard Lau, Werner Schanz
Patented Case
View Patent ↗
Granted: Jan 2, 1990
Filed: May 20, 1987
Inventors
Karl Kniesser
Walter Kornaker
Bernhard Lau
Werner Schanz
Assignee (at issue)
Nokia Graetz
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.