Granted Patent
Utility
US 6,571,931 · App. 09/820,348
Tamper-resistant vending machine
Inventor:
Kenneth W. Oden
Patented Case
View Patent ↗
Granted: Jun 3, 2003
Filed: Mar 29, 2001
Inventor
Kenneth W. Oden
Assignee (at issue)
ROYAL VENDORS, INC.
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.