Granted Patent
Utility
US 6,686,631 · App. 10/315,741
Negative differential resistance (NDR) device and method of operating same
Inventors:
Tsu-Jae King, David Liu
Patented Case
View Patent ↗
Granted: Feb 3, 2004
Filed: Dec 10, 2002
Inventors
Tsu-Jae King
David Liu
Assignee (at issue)
Progressant Technologies, 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.