Granted Patent
Utility
US 4,412,693 · App. 06/288,710
Swivel hose coupling with threaded nipple
Inventor:
Sergio Campanini
Patented Case
View Patent ↗
Granted: Nov 1, 1983
Filed: Jul 31, 1981
Inventor
Sergio Campanini
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.