Granted Patent
Utility
US 5,428,221 · App. 07/454,165
Heat radiation detection system
Inventor:
Boyd B. Bushman
Patented Case
View Patent ↗
Granted: Jun 27, 1995
Filed: Dec 21, 1989
Inventor
Boyd B. Bushman
Assignee (at issue)
Lockheed Corporation
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.