H04M 3/4288
Notifying a called subscriber of an incoming call during an ongoing call
Official title: {Notifying a called subscriber of an incoming call during an ongoing call, e.g. Call Waiting}
H04M3/4288 (Notifying a called subscriber of an incoming call during an ongoing call) appears on 172 US grants and 170 published applications in this corpus.
Search patents in H04M- Granted patents
- 172
- Published applications
- 170
- Assignees
- 109
- Inventors
- 357
- Latest grant
- 18 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 4 | 1 |
| 2002 | 3 | 3 |
| 2003 | 6 | 5 |
| 2004 | 4 | 6 |
| 2005 | 3 | 16 |
| 2006 | 8 | 8 |
| 2007 | 4 | 12 |
| 2008 | 9 | 10 |
| 2009 | 3 | 7 |
| 2010 | 6 | 7 |
| 2011 | 4 | 6 |
| 2012 | 9 | 4 |
| 2013 | 8 | 8 |
| 2014 | 9 | 11 |
| 2015 | 11 | 9 |
| 2016 | 13 | 16 |
| 2017 | 12 | 10 |
| 2018 | 9 | 6 |
| 2019 | 11 | 6 |
| 2020 | 4 | 4 |
| 2021 | 7 | 3 |
| 2022 | 6 | 3 |
| 2023 | 4 | 8 |
| 2024 | 2 | 0 |
| 2025 | 4 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Call prompt method, call device, readable storage medium, and chip system18 Nov 2025US 12,477,060 B2Huawei Technologies Co., Ltd.
- Systems and methods for call placement over a public switched telephone network1 Apr 2025US 12,267,458 B1Successful Cultures, Inc.
- Multi-call management system and method11 Mar 2025US 12,250,342 B1
- Enhanced call waiting for user equipment4 Feb 2025US 12,219,091 B2T-Mobile Innovations LLC
- System and method for customizing inmate communication notification10 Dec 2024US 12,166,891 B2Global Tel'Link Corporation
- Communication method and communication system6 Feb 2025US 2025/0047784 A1Honor Device Co., Ltd.
- System and method for management of plurality of calls14 Dec 2023US 2023/0403356 A1Buzibee Technologies Private Limited
- System and method for customizing inmate communication notification2 Nov 2023US 2023/0353369 A1Global Tel'Link Corporation
- Systems and methods for providing caller identification over a public switched telephone network26 Oct 2023US 2023/0344935 A1Successful Cultures, Inc.
- Call Prompt Method, Call Device, Readable Storage Medium, and Chip System12 Oct 2023US 2023/0328172 A1Huawei Technologies Co., Ltd.
Most cited
By later US patents
- Advanced call waiting and messaging system286US 5,894,504 AAT&T Corp. · 1999
- Method for providing call waiting notification to a party engaged in a data call268US 6,104,800 AMediaOne Group, Inc. · 2000
- Method and apparatus for providing internet call waiting with voice over internet protocol237US 6,661,785 B1BellSouth Intellectual Property Corporation · 2003
- Spontaneous caller identification with call-waiting221US 5,263,084 ANorthern Telecom Limited · 1993
- Method and apparatus for managing communications between a client and a server in a network221US 5,896,444 AWebTV Networks, Inc. · 1999