Granted Patent
Utility
US 5,667,317 · App. 08/520,457
Fluorescent security system for printed transaction records
Inventor:
Yaoping Tan
Patented Case
View Patent ↗
Granted: Sep 16, 1997
Filed: Aug 29, 1995
Inventor
Yaoping Tan
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.