Granted Patent
Utility
US 4,266,458 · App. 06/045,910
Slitting cutter for partially slitting sheet metal web
Inventor:
John William Mitchell Rogers
Patented Case
View Patent ↗
Granted: May 12, 1981
Filed: Jun 6, 1979
Inventor
John William Mitchell Rogers
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.