H04J 3/12
Arrangements providing for calling or supervisory signals
H04J3/12 (Arrangements providing for calling or supervisory signals) appears on 595 US grants and 283 published applications in this corpus.
Search patents in H04J- Granted patents
- 595
- Published applications
- 283
- Assignees
- 210
- Inventors
- 1,057
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 3 | 0 |
| 1978 | 6 | 0 |
| 1979 | 8 | 0 |
| 1980 | 10 | 0 |
| 1981 | 4 | 0 |
| 1982 | 8 | 0 |
| 1983 | 7 | 0 |
| 1984 | 7 | 0 |
| 1985 | 4 | 0 |
| 1986 | 9 | 0 |
| 1987 | 7 | 0 |
| 1988 | 8 | 0 |
| 1989 | 5 | 0 |
| 1990 | 11 | 0 |
| 1991 | 11 | 0 |
| 1992 | 12 | 0 |
| 1993 | 10 | 0 |
| 1994 | 15 | 0 |
| 1995 | 19 | 0 |
| 1996 | 9 | 0 |
| 1997 | 8 | 0 |
| 1998 | 23 | 0 |
| 1999 | 19 | 0 |
| 2000 | 25 | 0 |
| 2001 | 35 | 4 |
| 2002 | 27 | 12 |
| 2003 | 24 | 14 |
| 2004 | 14 | 13 |
| 2005 | 10 | 13 |
| 2006 | 8 | 5 |
| 2007 | 8 | 7 |
| 2008 | 10 | 8 |
| 2009 | 8 | 7 |
| 2010 | 8 | 7 |
| 2011 | 6 | 7 |
| 2012 | 3 | 7 |
| 2013 | 8 | 18 |
| 2014 | 11 | 10 |
| 2015 | 12 | 18 |
| 2016 | 13 | 9 |
| 2017 | 21 | 8 |
| 2018 | 14 | 13 |
| 2019 | 7 | 0 |
| 2020 | 11 | 23 |
| 2021 | 12 | 15 |
| 2022 | 18 | 17 |
| 2023 | 12 | 21 |
| 2024 | 8 | 13 |
| 2025 | 24 | 9 |
| 2026 | 4 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method and apparatus for supporting clock synchronization of user equipment in wireless communication system2 Jun 2026US 12,647,909 B2Samsung Electronics Co., Ltd.
- Communication of network time synchronization5 May 2026US 12,621,119 B2Schweitzer Engineering Laboratories, Inc.
- Clock synchronization mode indication method and communication apparatus10 Mar 2026US 12,574,874 B2Huawei Technologies Co., Ltd.
- Method and system for interaction between 5G and multiple TSC/TSN domains3 Feb 2026US 12,542,693 B2Telefonaktiebolaget LM Ericsson (publ)
- Port status configuration method, apparatus, and system, and storage medium30 Dec 2025US 12,512,921 B2Huawei Technologies Co., Ltd.
- Timing error group (teg) reporting in o-ran deployment16 Jul 2026US 2026/0205975 A1QUALCOMM Incorporated
- Clock synchronization mode indication method and communication apparatus18 Jun 2026US 2026/0173001 A1Huawei Technologies Co., Ltd.
- System, Method, And Apparatus For Operating A High Efficiency, High Output Transmission23 Apr 2026US 2026/0110356 A1Eaton Cummins Automated Transmission Technologies, LLC
- Systems and methods for synchronizing network nodes26 Mar 2026US 2026/0088968 A1Cisco Technology, Inc.
- Slot adjustment method, communication device and storage medium26 Feb 2026US 2026/0059504 A1Zte Corporation
Most cited
By later US patents
- Real-time digital signal processing relative to multiple digital communication channels263US 4,991,169 AInternational Business Machines Corporation · 1991
- Method of transmitting audio information and additional information in digital form256US 4,750,173 APolygram International Holding B.V. · 1988
- Orderwire communication system227US 4,449,246 AHarris Corporation · 1984
- Broadband telecommunications system213US 5,991,301 ASprint Communications Co.L.P. · 1999
- Device for transmitting data words representing a digitalized analog signal and device for receiving the transmitted data words172US 5,146,457 AU. S. Philips Corporation · 1992