H04M 3/24
With provision for checking the normal operation
Official title: with provision for checking the normal operation
H04M3/24 (With provision for checking the normal operation) appears on 484 US grants and 226 published applications in this corpus.
Search patents in H04M- Granted patents
- 484
- Published applications
- 226
- Assignees
- 233
- Inventors
- 960
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 7 | 0 |
| 1982 | 4 | 0 |
| 1983 | 9 | 0 |
| 1984 | 3 | 0 |
| 1985 | 6 | 0 |
| 1986 | 13 | 0 |
| 1987 | 10 | 0 |
| 1988 | 10 | 0 |
| 1989 | 13 | 0 |
| 1990 | 12 | 0 |
| 1991 | 7 | 0 |
| 1992 | 11 | 0 |
| 1993 | 17 | 0 |
| 1994 | 15 | 0 |
| 1995 | 16 | 0 |
| 1996 | 21 | 0 |
| 1997 | 16 | 0 |
| 1998 | 17 | 0 |
| 1999 | 11 | 0 |
| 2000 | 10 | 0 |
| 2001 | 11 | 2 |
| 2002 | 12 | 15 |
| 2003 | 12 | 16 |
| 2004 | 11 | 12 |
| 2005 | 8 | 10 |
| 2006 | 13 | 15 |
| 2007 | 10 | 18 |
| 2008 | 5 | 11 |
| 2009 | 11 | 1 |
| 2010 | 7 | 6 |
| 2011 | 12 | 7 |
| 2012 | 9 | 4 |
| 2013 | 8 | 3 |
| 2014 | 11 | 9 |
| 2015 | 11 | 11 |
| 2016 | 16 | 12 |
| 2017 | 7 | 3 |
| 2018 | 5 | 2 |
| 2019 | 7 | 5 |
| 2020 | 6 | 5 |
| 2021 | 6 | 14 |
| 2022 | 10 | 14 |
| 2023 | 15 | 7 |
| 2024 | 8 | 10 |
| 2025 | 8 | 8 |
| 2026 | 6 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- System and method for communication data identification and alert generation via a machine learning framework2 Jun 2026US 12,647,494 B2Bank of America Corporation
- End-to-end emergency call testing26 May 2026US 12,641,177 B2T-Mobile USA, Inc.
- Automatic circuit configuration detection in legacy telephone networks10 Mar 2026US 12,574,286 B2AT&T Intellectual Property I, L. P.
- IVR system testing using internet-enabled telephony devices and in-country dialing17 Feb 2026US 12,555,564 B2Cyara Solutions Pty Ltd
- Inbound and outbound communication session and call control3 Feb 2026US 12,542,850 B2MBTE Holdings Sweden AB
- System and method for communication data identification and alert generation via a machine learning framework6 Aug 2026US 2026/0230539 A1Bank of America Corporation
- Inbound and outbound communication session and call control6 Aug 2026US 2026/0230556 A1MBTE Holdings Sweden AB
- System and method for timely detection and reporting telecom cable and other telecom equipement theft28 May 2026US 2026/0148625 A1
- Providing Telephony Services Using An On-Premises Telephony Node5 Mar 2026US 2026/0067405 A1Zoom Communications, Inc.
- Ostomy appliance with electrode multiplexing and related methods8 Jan 2026US 2026/0007538 A9Coloplast A/S
Most cited
By later US patents
- Software fault management system476US 6,012,152 ATelefonaktiebolaget LM Ericsson (publ) · 2000
- Method and apparatus for interconnecting a circuit-switched telephony network and a packet-switched data network, and applications thereof327US 6,333,931 B1Cisco Technology, Inc. · 2001
- Method and apparatus for providing user controlled call management services292US 5,548,636 ANorthern Telecom Limited · 1996
- Event correlation267US 5,748,098 ABritish Telecommunications Public Ltd.Co. · 1998
- Reliable local data network arrangement263US 4,692,918 AAT&T Bell Laboratories · 1987