Granted Patent
Utility
US 4,969,850 · App. 07/379,231
Method of manufacturing a cold cathode, field emission device and a field emission device manufactured by the method
Inventor:
James L. S. Wales
Patented Case
View Patent ↗
Granted: Nov 13, 1990
Filed: Jul 13, 1989
Inventor
James L. S. Wales
Assignee (at issue)
Thorn EMI plc
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.