Granted Patent
Utility
US 5,217,218 · App. 07/814,777
Dual auger stacking device and control therefor
Inventor:
Mario Ricciardi
Patented Case
View Patent ↗
Granted: Jun 8, 1993
Filed: Dec 30, 1991
Inventor
Mario Ricciardi
Assignee (at issue)
Bell and Howell, 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.