H04M 3/305
Testing of physical copper line parameters
Official title: {testing of physical copper line parameters, e.g. capacitance or resistance (locating faults in cables G01R31/08)}
H04M3/305 (Testing of physical copper line parameters) appears on 355 US grants and 342 published applications in this corpus.
Search patents in H04M- Granted patents
- 355
- Published applications
- 342
- Assignees
- 136
- Inventors
- 503
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 6 | 0 |
| 2000 | 6 | 0 |
| 2001 | 12 | 4 |
| 2002 | 9 | 16 |
| 2003 | 13 | 15 |
| 2004 | 16 | 23 |
| 2005 | 13 | 23 |
| 2006 | 23 | 20 |
| 2007 | 14 | 25 |
| 2008 | 16 | 17 |
| 2009 | 20 | 15 |
| 2010 | 19 | 13 |
| 2011 | 8 | 16 |
| 2012 | 22 | 20 |
| 2013 | 16 | 18 |
| 2014 | 27 | 20 |
| 2015 | 25 | 23 |
| 2016 | 20 | 9 |
| 2017 | 10 | 7 |
| 2018 | 4 | 7 |
| 2019 | 11 | 4 |
| 2020 | 6 | 6 |
| 2021 | 4 | 2 |
| 2022 | 4 | 19 |
| 2023 | 7 | 4 |
| 2024 | 8 | 8 |
| 2025 | 8 | 5 |
| 2026 | 4 | 3 |
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.
- 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.
- Method of Digital Labeling Control System Terminals That Enables Guided Wiring4 Sep 2025US 2025/0280504 A1PassiveLogic, Inc.
Most cited
By later US patents
- Detection of bridge tap using frequency domain analysis258US 6,177,801 B1Sunrise Telecom Incorporated · 2001
- Controller modules155US 11,229,138 B1PassiveLogic, Inc. · 2022
- Method and system for estimating the ability of a subscriber loop to support broadband services131US 6,091,713 ATelcordia Technologies, Inc. · 2000
- Loop certification and measurement for ADSL125US 6,215,855 B1Bell Atlantic Network Services, Inc. · 2001
- System and method of determining cable characteristics110US 5,128,619 A1992