Granted Patent
Utility
US 4,842,201 · App. 07/121,400
Rotary stream sprinkler unit
Inventor:
Edwin J. Hunter
Patented Case
View Patent ↗
Granted: Jun 27, 1989
Filed: Nov 16, 1987
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.