Granted Patent
Utility
US 4,339,085 · App. 06/139,844
Reversible material reducing mill
Inventor:
Robert M. Williams
Patented Case
View Patent ↗
Granted: Jul 13, 1982
Filed: Apr 14, 1980
Inventor
Robert M. Williams
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.