Granted Patent
Utility
US 5,990,604 · App. 09/017,361
Field emmitters of wide-bandgap materials
Inventors:
Michael W. Geis, Jonathan Twichell, Theodore M. Lyszczarz, Nickolay N. Efremow
Patented Case
View Patent ↗
Granted: Nov 23, 1999
Filed: Feb 2, 1998
Inventors
Michael W. Geis
Jonathan Twichell
Theodore M. Lyszczarz
Nickolay N. Efremow
Assignee (at issue)
MASSACHUSETTS INSTITUTE OF TECHNOLOGY
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.