Granted Patent
Utility
US 5,199,666 · App. 07/816,713
Rotary shredding apparatus with oscillating grate
Inventor:
Robert M. Williams
Patented Case
View Patent ↗
Granted: Apr 6, 1993
Filed: Jan 3, 1992
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.