Special services > Service trigger (activation or deactivation) > Line or loop condition > No answer (e.g., ringing signal, on-hook, idle) > Number of rings > Patents

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Class Information
Number: 379/207.09
Name: Telephonic communications > Special services > Service trigger (activation or deactivation) > Line or loop condition > No answer (e.g., ringing signal, on-hook, idle) > Number of rings
Description: Subject matter wherein the implementation of a service is controlled in response to counting a predetermined number of rings without receiving an answer from a called party.

Patents under this class:

Patent Number	Title Of Patent	Date Issued
7233653	Method and installation for telephone inquiry	Jun. 19, 2007
6668059	Telephone tuning and signaling system	Dec. 23, 2003
5502761	Apparatus and method for relaying calling information to a pager or alternate telephone	Mar. 26, 1996
5475737	Toll saver for centralized messaging systems	Dec. 12, 1995
5475748	Automatic telephone system with function for multiple out-dialed calls per caller	Dec. 12, 1995
4768221	Remote reprogramming system for telephone call forwarding service	Aug. 30, 1988