Granted Patent
Utility
US 4,793,244 · App. 07/119,728
Ventilation device for food dispensing machine
Inventor:
Alan M. King
Patented Case
View Patent ↗
Granted: Dec 27, 1988
Filed: Nov 12, 1987
Inventor
Alan M. King
Assignee (at issue)
Vendking International LTEE
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.