H04M 3/005
Interface circuits for subscriber lines
Official title: {Interface circuits for subscriber lines (current supply H04M19/00 and subgroups; supervisory, monitoring or testing arrangements H04M3/22 and subgroups; in key telephone systems H04M9/006)}
H04M3/005 (Interface circuits for subscriber lines) appears on 564 US grants and 352 published applications in this corpus.
Search patents in H04M- Granted patents
- 564
- Published applications
- 352
- Assignees
- 264
- Inventors
- 980
- Latest grant
- 9 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 5 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 2 | 0 |
| 1988 | 6 | 0 |
| 1989 | 6 | 0 |
| 1990 | 6 | 0 |
| 1991 | 10 | 0 |
| 1992 | 7 | 0 |
| 1993 | 6 | 0 |
| 1994 | 9 | 0 |
| 1995 | 8 | 0 |
| 1996 | 14 | 0 |
| 1997 | 7 | 0 |
| 1998 | 18 | 0 |
| 1999 | 21 | 0 |
| 2000 | 22 | 0 |
| 2001 | 32 | 7 |
| 2002 | 23 | 41 |
| 2003 | 23 | 31 |
| 2004 | 32 | 47 |
| 2005 | 35 | 40 |
| 2006 | 46 | 27 |
| 2007 | 27 | 23 |
| 2008 | 19 | 20 |
| 2009 | 14 | 11 |
| 2010 | 18 | 13 |
| 2011 | 20 | 13 |
| 2012 | 15 | 10 |
| 2013 | 16 | 7 |
| 2014 | 16 | 10 |
| 2015 | 14 | 11 |
| 2016 | 6 | 15 |
| 2017 | 6 | 4 |
| 2018 | 11 | 4 |
| 2019 | 8 | 6 |
| 2020 | 7 | 2 |
| 2021 | 2 | 4 |
| 2022 | 4 | 3 |
| 2023 | 4 | 1 |
| 2024 | 2 | 1 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Contact list reconciliation and permissioning9 Sep 2025US 12,412,582 B2Amazon Technologies, Inc.
- Method and apparatus for continuous access network monitoring and packet loss estimation20 Feb 2024US 11,909,617 B2Assia Spe, LLC
- Quad TVS protection circuit for an electronic DSL component23 Jan 2024US 11,882,235 B2ARRIS Enterprises LLC
- Contact list reconciliation and permissioning26 Dec 2023US 11,854,552 B2Amazon Technologies, Inc.
- System and method for multi-mode customer service interaction11 Jul 2023US 11,700,331 B2Verint Americas Inc.
- Event-based application interface transmission across mobile devices27 Mar 2025US 2025/0106323 A1Motorola Mobility LLC
- Contact list reconciliation and permissioning25 Apr 2024US 2024/0135932 A1Amazon Technologies, Inc.
- Quad tvs protection circuit for an electronic dsl component29 Jun 2023US 2023/0208965 A1ARRIS Enterprises LLC
- Devices and methods for multipath communications8 Dec 2022US 2022/0394124 A1Competitive Access Systems, Inc.
- Method and apparatus for continuous access network monitoring and packet loss estimation5 May 2022US 2022/0141112 A1Assia Spe, LLC
Most cited
By later US patents
- Telephone control system with branch routing343US 5,375,161 AAccessLine Technologies, Inc. · 1994
- Digital loop carrier remote terminal having integrated digital subscriber plug-in line cards for multiplexing of telephone and broadband signals259US 6,480,487 B1Verizon Services Group · 2002
- Remote access telephone control system221US 4,893,335 AFuller Research and Development Company · 1990
- ADSL integrated line card with digital splitter and POTS CODEC without bulky analog splitter189US 5,889,856 ACentillium Technology Corp. · 1999
- Enhanced call waiting161US 5,825,867 AAspect Telecommunications Corporation · 1998