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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 |
| 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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