H04M 3/30
For subscriber's lines , for the local loop
Official title: for subscriber's lines {, for the local loop}
H04M3/30 (For subscriber's lines , for the local loop) appears on 1,320 US grants and 785 published applications in this corpus.
Search patents in H04M- Granted patents
- 1,320
- Published applications
- 785
- Assignees
- 436
- Inventors
- 1,923
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 10 | 0 |
| 1978 | 6 | 0 |
| 1979 | 5 | 0 |
| 1980 | 8 | 0 |
| 1981 | 4 | 0 |
| 1982 | 6 | 0 |
| 1983 | 18 | 0 |
| 1984 | 24 | 0 |
| 1985 | 28 | 0 |
| 1986 | 23 | 0 |
| 1987 | 27 | 0 |
| 1988 | 15 | 0 |
| 1989 | 22 | 0 |
| 1990 | 12 | 0 |
| 1991 | 17 | 0 |
| 1992 | 14 | 0 |
| 1993 | 14 | 0 |
| 1994 | 17 | 0 |
| 1995 | 36 | 0 |
| 1996 | 24 | 0 |
| 1997 | 35 | 0 |
| 1998 | 35 | 0 |
| 1999 | 41 | 0 |
| 2000 | 23 | 0 |
| 2001 | 43 | 13 |
| 2002 | 42 | 60 |
| 2003 | 53 | 45 |
| 2004 | 55 | 57 |
| 2005 | 42 | 64 |
| 2006 | 59 | 45 |
| 2007 | 44 | 50 |
| 2008 | 36 | 52 |
| 2009 | 43 | 43 |
| 2010 | 40 | 45 |
| 2011 | 34 | 29 |
| 2012 | 55 | 36 |
| 2013 | 45 | 38 |
| 2014 | 57 | 39 |
| 2015 | 44 | 39 |
| 2016 | 40 | 20 |
| 2017 | 19 | 20 |
| 2018 | 14 | 12 |
| 2019 | 19 | 9 |
| 2020 | 11 | 9 |
| 2021 | 10 | 7 |
| 2022 | 7 | 23 |
| 2023 | 11 | 9 |
| 2024 | 12 | 10 |
| 2025 | 10 | 7 |
| 2026 | 4 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Broadband access management systems and methods1 Sep 2026US 12,726,566 B2Epic Lane Networks, LP
- Detecting a disconnect at a DSLAM14 Jul 2026US 12,684,062 B2British Telecommunications Public Ltd.Co.
- Automated terminal wiring modification12 May 2026US 12,628,305 B1PassiveLogic, Inc.
- Method and apparatus for generalized control of devices6 Jan 2026US 12,520,446 B2PassiveLogic, Inc.
- Detecting modem power state change30 Dec 2025US 12,513,240 B2British Telecommunications Public Ltd.Co.
- Methods, controllers, and machine-readable storage media for automated commissioning of equipment8 Oct 2026US 2026/0313820 A1PassiveLogic, Inc.
- System for supporting in-field testing of links of a communication network25 Jun 2026US 2026/0180888 A1Fibercop S.P.A.
- Method and apparatus for generalized control of devices26 Mar 2026US 2026/0089863 A1PassiveLogic, Inc.
- Detecting a disconnect at a dslam26 Feb 2026US 2026/0059047 A1British Telecommunications Public Ltd.Co.
- Perceptible Indicators of Wires Being Attached Correctly to Controller16 Oct 2025US 2025/0324535 A1PassiveLogic, Inc.
Most cited
By later US patents
- Detection of bridge tap using frequency domain analysis258US 6,177,801 B1Sunrise Telecom Incorporated · 2001
- On demand plug-in jack card and monitor frame252US 5,685,741 AADC Telecommunications, Inc. · 1997
- Pressure alarms and reports system module for proactive maintenance application234US 6,771,739 B1BellSouth Intellectual Property Corporation · 2004
- Advanced intelligent network based computer architecture for concurrent delivery of voice and text data using failure management system216US 5,696,809 ABell Atlantic Network Services, Inc. · 1997
- Multi-lumen endoscopic catheter186US 5,788,681 AMedical Innovations Corporation · 1998