Granted Patent
Utility
US 5,930,345 · App. 08/858,940
Public telephone clip-on fraud prevention system
Inventors:
Steven F. Dauble, Joseph I. Hermo, Ming Ho Lee, Astley George Nelson
Patented Case
View Patent ↗
Granted: Jul 27, 1999
Filed: May 20, 1997
Inventors
Steven F. Dauble
Joseph I. Hermo
Ming Ho Lee
Astley George Nelson
Assignee (at issue)
Lucent Technology
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.