Granted Patent
Utility
US 5,559,331 · App. 07/632,790
Split-ring infrared detector
Inventor:
Richard C. McKee
Patented Case
View Patent ↗
Granted: Sep 24, 1996
Filed: Dec 24, 1990
Inventor
Richard C. McKee
Assignee (at issue)
NORTHROP GRUMMAN 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.