Granted Patent
Utility
US 4,288,038 · App. 06/104,750
Waste material processing apparatus
Inventor:
Robert M. Williams
Patented Case
View Patent ↗
Granted: Sep 8, 1981
Filed: Dec 17, 1979
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.