Granted Patent
Utility
US 4,839,702 · App. 07/123,143
Semiconductor device based on charge emission from a quantum well
Inventors:
Anatoly Grinberg, Alexander Kastalsky
Patented Case
View Patent ↗
Granted: Jun 13, 1989
Filed: Nov 20, 1987
Inventors
Anatoly Grinberg
Alexander Kastalsky
Assignee (at issue)
Bell Communications Research, 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.