Granted Patent
Utility
US 6,131,399 · App. 09/205,185
Refrigerated vending machine
Inventor:
Donald M. Hall
Patented Case
View Patent ↗
Granted: Oct 17, 2000
Filed: Dec 4, 1998
Inventor
Donald M. Hall
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.