Granted Patent
Utility
US 4,529,441 · App. 06/648,320
Electrical steels
Inventor:
Brian S. Smith
Patented Case
View Patent ↗
Granted: Jul 16, 1985
Filed: Sep 7, 1984
Inventor
Brian S. Smith
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.