Granted Patent
Utility
US 4,769,867 · App. 07/092,626
Swimming pool cleaning device
Inventor:
Herman Stoltz
Patented Case
View Patent ↗
Granted: Sep 13, 1988
Filed: Sep 3, 1987
Inventor
Herman Stoltz
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.