Granted Patent
Utility
US 5,910,474 · App. 08/875,267
Method of rinsing showers clean
Inventor:
Robert H. Black
Patented Case
View Patent ↗
Granted: Jun 8, 1999
Filed: Jul 18, 1997
Inventor
Robert H. Black
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.