Granted Patent
Utility
US 4,942,334 · App. 07/200,606
Electron-gun system
Inventors:
Helmut Kimmel, Hans Reule
Patented Case
View Patent ↗
Granted: Jul 17, 1990
Filed: May 31, 1988
Inventors
Helmut Kimmel
Hans Reule
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.