Granted Patent
Utility
US 3,977,610 · App. 05/643,193
Oscillating sprinkler
Inventor:
John A. Royer
Patented Case
View Patent ↗
Granted: Aug 31, 1976
Filed: Dec 22, 1975
Inventor
John A. Royer
Assignee (at issue)
James R. Coson
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.