Granted Patent
Utility
US 4,428,186 · App. 06/371,252
Chain making apparatus
Inventors:
Thomas Hedren, Albert Eriksson, Sylve Antonasson, Rolf Gösta Larsson
Patented Case
View Patent ↗
Granted: Jan 31, 1984
Filed: Apr 23, 1982
Inventors
Thomas Hedren
Albert Eriksson
Sylve Antonasson
Rolf Gösta Larsson
Assignee (at issue)
THE ESAB GROUP INC.
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.