Granted Patent
Utility
US 4,970,971 · App. 07/420,383
System of and apparatus for sanitizing waste material
Inventor:
Robert M. Williams
Patented Case
View Patent ↗
Granted: Nov 20, 1990
Filed: Oct 12, 1989
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.