Granted Patent
Utility
US 4,665,391 · App. 06/834,698
Empty container detector
Inventor:
Wayne M. Spani
Patented Case
View Patent ↗
Granted: May 12, 1987
Filed: Feb 27, 1986
Inventor
Wayne M. Spani
Assignee (at issue)
WARNER-LAMBERT COMPANY LLC
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.