Granted Patent
Utility
US 5,543,628 · App. 08/289,727
Quantum well infrared filter
Inventors:
David H. Chow, Colin G. Whitney
Patented Case
View Patent ↗
Granted: Aug 6, 1996
Filed: Aug 12, 1994
Inventors
David H. Chow
Colin G. Whitney
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.