Granted Patent
Utility
US 5,351,285 · App. 08/047,241
Multiple format telephonic interface control system
Inventor:
Ronald A. Katz
Patented Case
View Patent ↗
Granted: Sep 27, 1994
Filed: Apr 13, 1993
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.