Granted Patent
Utility
US 4,780,749 · App. 06/880,850
Double barrier tunnel diode having modified injection layer
Inventor:
Joel N. Schulman
Patented Case
View Patent ↗
Granted: Oct 25, 1988
Filed: Jul 1, 1986
Inventor
Joel N. Schulman
Assignee (at issue)
Hughes Aircraft Company
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.