H04M 3/56
Arrangements for connecting several subscribers to a common circuit, i.e. affording conference
Official title: Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities (video conference systems H04N7/15)
H04M3/56 (Arrangements for connecting several subscribers to a common circuit, i.e. affording conference) appears on 5,604 US grants and 5,419 published applications in this corpus.
Search patents in H04M- Granted patents
- 5,604
- Published applications
- 5,419
- Assignees
- 1,372
- Inventors
- 9,083
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 15 | 0 |
| 1977 | 13 | 0 |
| 1978 | 9 | 0 |
| 1979 | 8 | 0 |
| 1980 | 11 | 0 |
| 1981 | 19 | 0 |
| 1982 | 16 | 0 |
| 1983 | 6 | 0 |
| 1984 | 28 | 0 |
| 1985 | 21 | 0 |
| 1986 | 18 | 0 |
| 1987 | 25 | 0 |
| 1988 | 17 | 0 |
| 1989 | 17 | 0 |
| 1990 | 14 | 0 |
| 1991 | 16 | 0 |
| 1992 | 9 | 0 |
| 1993 | 13 | 0 |
| 1994 | 22 | 0 |
| 1995 | 34 | 0 |
| 1996 | 64 | 0 |
| 1997 | 56 | 0 |
| 1998 | 87 | 0 |
| 1999 | 87 | 0 |
| 2000 | 65 | 0 |
| 2001 | 90 | 39 |
| 2002 | 91 | 149 |
| 2003 | 69 | 186 |
| 2004 | 93 | 175 |
| 2005 | 95 | 198 |
| 2006 | 139 | 156 |
| 2007 | 93 | 216 |
| 2008 | 95 | 251 |
| 2009 | 117 | 202 |
| 2010 | 146 | 187 |
| 2011 | 163 | 187 |
| 2012 | 231 | 198 |
| 2013 | 299 | 319 |
| 2014 | 343 | 301 |
| 2015 | 346 | 364 |
| 2016 | 347 | 310 |
| 2017 | 331 | 252 |
| 2018 | 273 | 244 |
| 2019 | 274 | 236 |
| 2020 | 279 | 202 |
| 2021 | 189 | 203 |
| 2022 | 195 | 219 |
| 2023 | 189 | 230 |
| 2024 | 187 | 201 |
| 2025 | 151 | 125 |
| 2026 | 89 | 69 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Adapting AI voice interactions based on caller voice characteristics6 Oct 2026US 12,756,781 B1Rapidsos, Inc.
- Connected devices call exit management6 Oct 2026US 12,756,782 B2Motorola Mobility LLC
- Context-dependent in-call video codec switching29 Sep 2026US 12,750,251 B2Google Inc.
- Monitoring and detection of fraudulent or unauthorized use in telephone conferencing systems or voice networks22 Sep 2026US 12,744,823 B2Level 3 Communications, LLC
- System for requesting emergency service in an online collaboration context22 Sep 2026US 12,744,847 B2Microsoft Technology Licensing, LLC
- Electronic device and method for performing audio communication between first space and second space1 Oct 2026US 2026/0299872 A1Realtek Semiconductor Corp.
- Transmission management apparatus1 Oct 2026US 2026/0303755 A1Ricoh Company, Ltd.
- Systems and methods for seamless teleconferencing24 Sep 2026US 2026/0292071 A1Cisco Technology, Inc.
- Method and device for interacting with a voice assistant during a conference call17 Sep 2026US 2026/0277539 A1Tymphany Hk Limited
- Real-time bi-directional language translation using dual language models in conference calls3 Sep 2026US 2026/0260080 A1Twilio Inc.
Most cited
By later US patents
- Method of using a communications device together with another communications device, a communications system, a communications device and an accessory device for use in connection with a communications device1,777US 7,130,608 B2Telefonaktiegolaget LM Ericsson (publ) · 2006
- Conference call method and apparatus therefor1,726US 7,236,773 B2Nokia Mobile Phones Ltd. · 2007
- System, method and article of manufacture for communications utilizing calling, plans in a hybrid network1,175US 5,867,495 AMCI Communications Corporations · 1999
- Distributed system to intelligently establish sessions between anonymous users over various networks1,052US 6,564,261 B1Telefonaktiebolaget LM Ericsson (publ) · 2003
- System, method and article of manufacture with integrated video conferencing billing in a communication system architecture751US 5,867,494 AMCI Communication Corporation · 1999