H04M 3/5231
With call back arrangements
Official title: {with call back arrangements}
H04M3/5231 (With call back arrangements) appears on 450 US grants and 380 published applications in this corpus.
Search patents in H04M- Granted patents
- 450
- Published applications
- 380
- Assignees
- 172
- Inventors
- 617
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 5 | 0 |
| 2000 | 5 | 0 |
| 2001 | 6 | 6 |
| 2002 | 10 | 19 |
| 2003 | 11 | 8 |
| 2004 | 11 | 8 |
| 2005 | 7 | 6 |
| 2006 | 5 | 8 |
| 2007 | 7 | 14 |
| 2008 | 3 | 4 |
| 2009 | 4 | 8 |
| 2010 | 7 | 7 |
| 2011 | 6 | 5 |
| 2012 | 9 | 6 |
| 2013 | 16 | 15 |
| 2014 | 18 | 29 |
| 2015 | 34 | 22 |
| 2016 | 36 | 25 |
| 2017 | 27 | 16 |
| 2018 | 29 | 12 |
| 2019 | 23 | 13 |
| 2020 | 21 | 18 |
| 2021 | 30 | 19 |
| 2022 | 22 | 28 |
| 2023 | 43 | 61 |
| 2024 | 19 | 9 |
| 2025 | 15 | 7 |
| 2026 | 7 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Internet telephone system, private branch exchange device and customer service scheduling method25 Aug 2026US 12,719,987 B2Acer Incorporated
- Method and a system for silent and non-exposing alerting of previously abandoned calls21 Apr 2026US 12,610,010 B2Atos Public Safety LLC
- Method and system for efficient callback functionality using signal coverage data21 Apr 2026US 12,610,011 B2Atos Public Safety LLC
- Temporary emergency call-back allowance over wireless networks21 Apr 2026US 12,610,430 B2T-Mobile USA, Inc.
- Systems and methods of augmented calling10 Mar 2026US 12,574,715 B1Meta Platforms Technologies, LLC
- Handling of disconnected calls in an omnichannel call center11 Jun 2026US 2026/0163979 A1International Business Machines Corporation
- Methods of handling psap call backs during ongoing emergency call28 May 2026US 2026/0150155 A1T-Mobile Innovations LLC
- Apparatus and method for adjusting estimted wait time in a contact center30 Apr 2026US 2026/0122182 A1Swampfox Technologies, Inc.
- Temporary Routing Rules for Emergency Call Telephone Numbers12 Mar 2026US 2026/0075139 A1Zoom Communications, Inc.
- Time-Weighted Priority Scoring System For Contact Center Routing29 Jan 2026US 2026/0032196 A1Zoom Communications, Inc.
Most cited
By later US patents
- System for coordinating communications via customer contact channel changing system using call centre for setting up the call between customer and an available help agent953US 5,884,032 AThe New Brunswick Telephone Company, Limited · 1999
- Arrangement for improving retention of call center's customers374US 6,064,731 ALucent Technologies Inc. · 2000
- Automatic call back system and method of operation292US 5,155,761 AIntervoice, Inc. · 1992
- Method and system for establishing voice communications using a computer network253US 5,991,394 ARockwell International Corporation · 1999
- Intelligent virtual queue245US 6,002,760 AGenesys Telecommunications Laboratories, Inc. · 1999