Granted Patent
Utility
US 5,875,645 · App. 08/835,702
Self-sealing vending machine refrigeration apparatus
Inventor:
David C. Dunnigan
Patented Case
View Patent ↗
Granted: Mar 2, 1999
Filed: Apr 10, 1997
Inventor
David C. Dunnigan
Assignee (at issue)
Gross-Given Manufacturing Company
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.