Granted Patent
Utility
US 5,520,089 · App. 08/321,738
Water organ
Inventor:
John Gilbert Prentiss
Patented Case
View Patent ↗
Granted: May 28, 1996
Filed: Oct 12, 1994
Inventor
John Gilbert Prentiss
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.