Granted Patent
Utility
US 4,331,919 · App. 06/070,525
Apparatus for magnetic testing ferromagnetic sheet or strip material using rectangular coils
Inventor:
Philip Beckley
Patented Case
View Patent ↗
Granted: May 25, 1982
Filed: Aug 28, 1979
Inventor
Philip Beckley
Assignee (at issue)
British Steel 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.