Granted Patent
Utility
US 5,665,973 · App. 08/548,229
Penetrant transparent comparator
Inventor:
Terry L. Christenson
Patented Case
View Patent ↗
Granted: Sep 9, 1997
Filed: Oct 25, 1995
Inventor
Terry L. Christenson
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.