Granted Patent
Utility
US 5,012,153 · App. 07/455,217
Split collector vacuum field effect transistor
Inventors:
Gary M. Atkinson, M. Duchesne Courtney
Patented Case
View Patent ↗
Granted: Apr 30, 1991
Filed: Dec 22, 1989
Inventors
Gary M. Atkinson
M. Duchesne Courtney
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.