Granted Patent
Utility
US 4,737,680 · App. 06/850,255
Gridded electron gun
Inventors:
Richard B. True, Donald E. Laycock
Patented Case
View Patent ↗
Granted: Apr 12, 1988
Filed: Apr 10, 1986
Inventors
Richard B. True
Donald E. Laycock
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.