Granted Patent
Utility
US 4,306,922 · App. 06/180,155
Electro magnetic steels
Inventors:
Alan Coombs, James H. Page
Patented Case
View Patent ↗
Granted: Dec 22, 1981
Filed: Aug 21, 1980
Inventors
Alan Coombs
James H. Page
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.