H04M 1/253
Telephone sets using digital voice transmission
H04M1/253 (Telephone sets using digital voice transmission) appears on 1,725 US grants and 1,962 published applications in this corpus.
Search patents in H04M- Granted patents
- 1,725
- Published applications
- 1,962
- Assignees
- 708
- Inventors
- 3,299
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 4 | 0 |
| 1989 | 1 | 0 |
| 1990 | 4 | 0 |
| 1991 | 9 | 0 |
| 1992 | 3 | 0 |
| 1993 | 5 | 0 |
| 1994 | 12 | 0 |
| 1995 | 11 | 0 |
| 1996 | 14 | 0 |
| 1997 | 22 | 0 |
| 1998 | 21 | 0 |
| 1999 | 17 | 0 |
| 2000 | 22 | 0 |
| 2001 | 31 | 29 |
| 2002 | 34 | 70 |
| 2003 | 35 | 97 |
| 2004 | 45 | 122 |
| 2005 | 45 | 145 |
| 2006 | 100 | 212 |
| 2007 | 47 | 210 |
| 2008 | 59 | 168 |
| 2009 | 88 | 134 |
| 2010 | 120 | 99 |
| 2011 | 108 | 87 |
| 2012 | 114 | 75 |
| 2013 | 136 | 71 |
| 2014 | 113 | 67 |
| 2015 | 83 | 87 |
| 2016 | 76 | 59 |
| 2017 | 52 | 40 |
| 2018 | 54 | 44 |
| 2019 | 55 | 37 |
| 2020 | 42 | 33 |
| 2021 | 40 | 26 |
| 2022 | 32 | 20 |
| 2023 | 35 | 14 |
| 2024 | 12 | 9 |
| 2025 | 12 | 6 |
| 2026 | 6 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Device independent text captioned telephone service18 Aug 2026US 12,712,968 B2Ultratec, Inc.
- Voice communication targeting user interface12 May 2026US 12,625,596 B1Amazon Technologies, Inc.
- Method and process for a voice communication system between businesses and customers using existing telephony and over data networks7 Apr 2026US 12,598,258 B2Duzzcall (Pvt) Ltd
- Unique call progress tone invocation timer per client or access type17 Mar 2026US 12,581,012 B2T-Mobile USA, Inc.
- Method for transmitting call audio data and apparatus10 Mar 2026US 12,574,458 B2Honor Device Co., Ltd.
- Device and method for configuring a voice channel in fttdp11 Jun 2026US 2026/0163924 A1NetComm Wireless Pty Ltd
- Transcription presentation of communication sessions14 Aug 2025US 2025/0259632 A1Sorenson IP Holdings, LLC
- Systems and methods for emulating a shared line system in a multicell network19 Jun 2025US 2025/0203014 A1VTech Telecommunications Limited
- Systems and methods for establishing a call connection24 Apr 2025US 2025/0133166 A1RingCentral, Inc.
- Emergency response (er) system for hybrid work softphone mobile devices in sda/sdn fabric networks6 Mar 2025US 2025/0081157 A1Cisco Technology, Inc.
Most cited
By later US patents
- Multifunctional world wide walkie talkie, a tri-frequency cellular-satellite wireless instant messenger computer and network for establishing global wireless volp quality of service (qos) communications, unified messaging, and video conferencing via the internet1,246US 6,763,226 B1Computer Science Central, Inc. · 2004
- Instant messaging via telephone interfaces754US 6,757,365 B1TellMe Networks, Inc. · 2004
- Methods and systems for automatic configuration of peripherals727US 8,006,002 B2Apple Inc. · 2011
- System for digital radio communication between a wireless lan and a PBX510US 6,330,244 B12001
- Voice over internet protocol telephone system and method504US 6,141,341 AMotorola, Inc. · 2000