Granted Patent
Utility
US 6,000,620 · App. 08/804,647
Magnetic card reader
Inventor:
David C. May
Patented Case
View Patent ↗
Granted: Dec 14, 1999
Filed: Feb 25, 1997
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.