Granted Patent
Utility
US 4,385,732 · App. 06/182,666
Waste material breaking and shredding apparatus
Inventor:
Robert M. Williams
Patented Case
View Patent ↗
Granted: May 31, 1983
Filed: Aug 29, 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.