Granted Patent
Utility
US 4,567,933 · App. 06/540,780
Device for manufacturing metal strips
Inventors:
Wilhelm F. Lauener, Rolf Wurgler
Patented Case
View Patent ↗
Granted: Feb 4, 1986
Filed: Oct 11, 1983
Inventors
Wilhelm F. Lauener
Rolf Wurgler
Assignee (at issue)
Swiss Aluminium Ltd.
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.