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Class Information
Number: 379/911
Name: Telephonic communications > Distinctive ringing
Description: Subject matter for the generation or detection of telephone ringing signals distinguishable from the standard mechanical-bell signals, for selective identification or routing of received calls relative to the caller or called party or equipment.

Patents under this class:

Patent Number Title Of Patent Date Issued
8442594 Communication device and method for processing incoming calls May. 14, 2013
8270590 User message delivery to calling party device Sep. 18, 2012
8175252 Ringback tone bookmark request by calling party May. 8, 2012
8073128 Ringback tone service opt-in and opt-out requests for use by calling party Dec. 6, 2011
8027455 Ringbacks based on extrinsic information Sep. 27, 2011
7715883 Alert signal generation May. 11, 2010
7596216 System and method for identifying redirected calls Sep. 29, 2009
7450710 System and method for identifying redirected calls Nov. 11, 2008
6751485 Sounding alert for recent calls Jun. 15, 2004
6650746 Urgency of call indication to called party through distinctive notification Nov. 18, 2003
6512825 Queue-based distinctive ringing in a call center system Jan. 28, 2003
5442692 Telecommunication system having a capability of changing the alerting tone Aug. 15, 1995
5361296 Modem with ring detection/modem processing capability Nov. 1, 1994
5333190 Telephone ring detection method and apparatus Jul. 26, 1994
5307059 Selective call receiver having customized voice alerts Apr. 26, 1994
5267307 Communication apparatus Nov. 30, 1993
5220599 Communication terminal apparatus and its control method with party identification and notification features Jun. 15, 1993
5202917 Telephone calling method and telephone apparatus Apr. 13, 1993
5200992 Communication apparatus having changeable communication procedure signals Apr. 6, 1993
5200994 Communication terminal apparatus and control method with party identification features Apr. 6, 1993
5062133 Multi-function telephone call management system Oct. 29, 1991
5040209 Telephone ringing monitoring and control system Aug. 13, 1991
4998273 Telephone line called number recognizer Mar. 5, 1991
4995075 Apparatus and method for encoding telephone ringing signals Feb. 19, 1991
4969186 Telephone message waiting system and apparatus Nov. 6, 1990
4926470 Telephone call screening circuit May. 15, 1990
4922526 Automated access facilities for use with key telephone systems May. 1, 1990
4899358 Call announcement arrangement Feb. 6, 1990
4893336 Call forwarding arrangement Jan. 9, 1990
4893335 Remote access telephone control system Jan. 9, 1990
4856055 Controllable telephone annunciator Aug. 8, 1989
4850012 Automated access facilities for use with key telephone systems Jul. 18, 1989
4782518 Apparatus for converting distinctive ring to selective ring in telephone lines Nov. 1, 1988
4639552 Apparatus for converting a standard telephone to an unlisted number telephone Jan. 27, 1987
4598179 Telephone privacy system Jul. 1, 1986
4591664 Multichannel interactive telephone answering apparatus May. 27, 1986
4578540 Telecommunications systems Mar. 25, 1986
4567333 Electronic tone ringer with distinctive signaling circuitry Jan. 28, 1986
4560837 Call transfer method and circuitry Dec. 24, 1985
4508937 Method and circuitry for encoding telephone ringing signals Apr. 2, 1985
4477697 Method and circuitry for encoding telephone ringing signals Oct. 16, 1984
4446334 Telephone number coding device May. 1, 1984
4277649 Method and apparatus for screening telephone calls Jul. 7, 1981
4113986 Telephone controlled lock release arrangement Sep. 12, 1978

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