Granted Patent
Utility
US 6,357,657 · App. 09/589,693
Anti-fraud device
Inventor:
David C. May
Patented Case
View Patent ↗
Granted: Mar 19, 2002
Filed: Jun 8, 2000
Inventor
David C. May
Assignee (at issue)
NCR Corporation
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.