Granted Patent
Utility
US 5,903,947 · App. 09/067,540
Restaurant sink cleaning tool
Inventor:
Patrick Sullivan
Patented Case
View Patent ↗
Granted: May 18, 1999
Filed: Apr 27, 1998
Inventor
Patrick Sullivan
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.