Granted Patent
Utility
US 4,155,754 · App. 05/846,930
Method of producing high density iron-base material
Inventor:
Jean C. Lynn
Patented Case
View Patent ↗
Granted: May 22, 1979
Filed: Oct 31, 1977
Inventor
Jean C. Lynn
Assignee (at issue)
AMSTED INDUSTRIES INCORPORATED
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.