Granted Patent
Utility
US 4,806,863 · App. 06/919,944
Eddy current apparatus including cylindrical coil with flux concentrator for high resolution detection of flaws in conductive objects
Inventor:
John K. White
Patented Case
View Patent ↗
Granted: Feb 21, 1989
Filed: Oct 17, 1986
Inventor
John K. White
Assignee (at issue)
Westinghouse Electric Company LLC
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.