Granted Patent
Utility
US 4,921,147 · App. 07/306,405
Pouring spout
Inventor:
Michel Poirier
Patented Case
View Patent ↗
Granted: May 1, 1990
Filed: Feb 6, 1989
Inventor
Michel Poirier
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.