Granted Patent
Utility
US 5,224,153 · App. 07/680,879
Voice-data telephonic interface control system
Inventor:
Ronald A. Katz
Patented Case
View Patent ↗
Granted: Jun 29, 1993
Filed: Apr 5, 1991
Inventor
Ronald A. Katz
Assignee (at issue)
First Data Resouces Inc.
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.