Granted Patent
Utility
US 5,603,365 · App. 08/559,024
Removable cutting blades for a helical cutterhead
Inventor:
John Sidney Stewart
Patented Case
View Patent ↗
Granted: Feb 18, 1997
Filed: Nov 16, 1995
Inventor
John Sidney Stewart
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.