Granted Patent
Utility
US 5,255,309 · App. 07/803,269
Telephonic-interface statistical analysis system
Inventor:
Ronald A. Katz
Patented Case
View Patent ↗
Granted: Oct 19, 1993
Filed: Dec 3, 1991
Inventor
Ronald A. Katz
Assignee (at issue)
FIRST DATA RESOURCES, LLC.
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.