Granted Patent
Utility
US 5,744,910 · App. 08/041,765
Periodic permanent magnet focusing system for electron beam
Inventor:
Robert S. Symons
Patented Case
View Patent ↗
Granted: Apr 28, 1998
Filed: Apr 2, 1993
Inventor
Robert S. Symons
Assignee (at issue)
Litton Systems, Inc.
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.