Method of and system for automatically switching between free directory assistance service and chargeable directory assistance service

Bibliographische Detailangaben

Hauptverfasser:	ROBERT C. DETRIE, DWIGHT E. SCOTT, RICHARD J. OLDACH, MICHAEL PELLEGRINO
Format:	Patent
Sprache:	eng
Schlagworte:	CALCULATING COMPUTING COUNTING DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FORADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORYOR FORECASTING PURPOSES ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY PHYSICS SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE,COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTINGPURPOSES, NOT OTHERWISE PROVIDED FOR TELEPHONIC COMMUNICATION
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