Granted Patent
Utility
US 4,624,412 · App. 06/648,949
Reversible turbine driven sprinkler unit
Inventor:
Edwin J. Hunter
Patented Case
View Patent ↗
Granted: Nov 25, 1986
Filed: Sep 10, 1984
Inventor
Edwin J. Hunter
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.