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Class Information
Number: 379/77
Name: Telephonic communications > Audio message storage, retrieval, or synthesis > Dynamic audio signal recording or reproduction > Call intercept or answering > Remote control over telephone line > Control by generated tone
Description: Subject matter wherein the specified signal has an audio frequency component.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7356130 |
Method and system for selecting speech or DTMF interfaces or a mixture of both |
Apr. 8, 2008 |
| 7181003 |
Direct drive for a subscriber line differential ringing signal |
Feb. 20, 2007 |
| 7181004 |
Direct drive for a subscriber line differential ringing signal having a DC offset |
Feb. 20, 2007 |
| 7062036 |
Telephone call information delivery system |
Jun. 13, 2006 |
| 6870833 |
Active voice messaging |
Mar. 22, 2005 |
| 6714630 |
System and method for screening calls |
Mar. 30, 2004 |
| 6654447 |
Method and system for pausing a session with an interactive voice response unit |
Nov. 25, 2003 |
| 6438214 |
Answering system for a communication device |
Aug. 20, 2002 |
| 6418198 |
Apparatus and method for verification of the presence of a remote user |
Jul. 9, 2002 |
| 6381330 |
False tone detect suppression using multiple frame sweeping harmonic analysis |
Apr. 30, 2002 |
| 6278770 |
Voice information service system and an operation method applied therein |
Aug. 21, 2001 |
| 6222466 |
Apparatus and a method for keyboard encoding |
Apr. 24, 2001 |
| 6115464 |
Method and system for distinguishing valid DTMF signals from spurious DTMF noise |
Sep. 5, 2000 |
| 6058164 |
Mode-switchable telephone and mode setting and switching methods for the same |
May. 2, 2000 |
| 5991367 |
Telephone call screener |
Nov. 23, 1999 |
| 5963617 |
Method for transferring registered speech message from automatic telephone answering system at a reserved time |
Oct. 5, 1999 |
| 5953391 |
Data communication apparatus having automatic data reception informing systems |
Sep. 14, 1999 |
| 5930339 |
Leaving a message on a held connection |
Jul. 27, 1999 |
| 5875231 |
Telephone call on hold service for a party placed on hold by another party |
Feb. 23, 1999 |
| 5835573 |
Method and system for call screening |
Nov. 10, 1998 |
| 5822403 |
Automated telephone hold device |
Oct. 13, 1998 |
| 5751760 |
Controller for a telephone system with code screening of incoming calls |
May. 12, 1998 |
| 5751794 |
Proactive voice mail service |
May. 12, 1998 |
| 5751790 |
Voice information service device and voice information service method |
May. 12, 1998 |
| 5727046 |
Personal electronic telephone directory apparatus with remote accessibility |
Mar. 10, 1998 |
| 5699421 |
Telephone answering device with low cost dual tone multi-frequency detector |
Dec. 16, 1997 |
| 5671268 |
Telephone answering machine |
Sep. 23, 1997 |
| 5651049 |
RF connected message recording device and method for a telephone system |
Jul. 22, 1997 |
| 5638436 |
Voice detection |
Jun. 10, 1997 |
| 5633917 |
Remote-control telephone answering system and method |
May. 27, 1997 |
| 5579377 |
Remote-control telephone answering system and method |
Nov. 26, 1996 |
| 5572576 |
Telephone answering device linking displayed data with recorded audio message |
Nov. 5, 1996 |
| 5568539 |
Interactive telephonic message delivery method and apparatus for providing an intended recipient of a voice audio message with options as to when he or she will hear the message |
Oct. 22, 1996 |
| 5561710 |
Interactive voice communication terminal with alpha and numeric keypad |
Oct. 1, 1996 |
| 5550900 |
Apparatus and method for routing messages in a telephone message center |
Aug. 27, 1996 |
| 5533104 |
Telephone answering device and method |
Jul. 2, 1996 |
| 5528669 |
Single cassette answering machine with dual phone line and mailbox features |
Jun. 18, 1996 |
| 5519764 |
Circuit and method for detecting error causing tones in a voice messaging system |
May. 21, 1996 |
| 5511112 |
Automated voice system for improving agent efficiency and improving service to parties on hold |
Apr. 23, 1996 |
| 5481596 |
Auxiliary baseband telephone interface for an answering machine |
Jan. 2, 1996 |
| 5459781 |
Selectively activated dual tone multi-frequency detector |
Oct. 17, 1995 |
| 5454029 |
Directory answering machine |
Sep. 26, 1995 |
| 5452342 |
Telephone terminal device with function for preventing unnecessary utilization of telephone line by unsolicited facsimile signal |
Sep. 19, 1995 |
| 5432844 |
Shared line answering system with enhanced extension device features |
Jul. 11, 1995 |
| 5426691 |
Method and apparatus for detecting a prescribed audio frequency actuating signal applied on to a telecommunication line |
Jun. 20, 1995 |
| 5392332 |
Shared line telephone answering system with a telephone line-powered disconnect module |
Feb. 21, 1995 |
| 5390236 |
Telephone answering device linking displayed data with recorded audio message |
Feb. 14, 1995 |
| RE34735 |
Call waiting arrangement providing options to both a subsequent calling party and to the called party |
Sep. 20, 1994 |
| 5339354 |
Shared line telephone answering device |
Aug. 16, 1994 |
| 5309505 |
Automated voice system for improving agent efficiency and improving service to parties on hold |
May. 3, 1994 |
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