H04M 3/304
And using xdsl modems
Official title: {and using xDSL modems (xDSL line qualification H04M3/306)}
H04M3/304 (And using xdsl modems) appears on 185 US grants and 201 published applications in this corpus.
Search patents in H04M- Granted patents
- 185
- Published applications
- 201
- Assignees
- 87
- Inventors
- 312
- Latest grant
- 30 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 1 |
| 2002 | 0 | 6 |
| 2003 | 1 | 1 |
| 2004 | 5 | 7 |
| 2005 | 9 | 12 |
| 2006 | 8 | 15 |
| 2007 | 8 | 14 |
| 2008 | 6 | 16 |
| 2009 | 10 | 16 |
| 2010 | 14 | 21 |
| 2011 | 15 | 9 |
| 2012 | 13 | 10 |
| 2013 | 13 | 10 |
| 2014 | 19 | 13 |
| 2015 | 12 | 11 |
| 2016 | 15 | 10 |
| 2017 | 5 | 7 |
| 2018 | 8 | 3 |
| 2019 | 7 | 4 |
| 2020 | 2 | 2 |
| 2021 | 2 | 3 |
| 2022 | 2 | 2 |
| 2023 | 3 | 4 |
| 2024 | 3 | 3 |
| 2025 | 3 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Detecting modem power state change30 Dec 2025US 12,513,240 B2British Telecommunications Public Ltd.Co.
- Systems, methods, and storage media for testing local loops of telecommunications networks10 Jun 2025US 12,328,410 B2Level 3 Communications, LLC
- Easy DSL signal detector4 Mar 2025US 12,244,471 B2CenturyLink Intellectual Property LLC
- Measuring and analyzing data to generate recommendations associated with a digital subscription line (DSL)16 Jul 2024US 12,040,847 B2Viavi Solutions Inc.
- Systems, methods, and storage media for testing local loops of telecommunications networks11 Jun 2024US 12,010,261 B2Level 3 Communications, LLC
- Easy dsl signal detector19 Jun 2025US 2025/0202781 A1CenturyLink Intellectual Property LLC
- Measuring and analyzing data to generate recommendations associated with a digital subscription line (dsl)3 Oct 2024US 2024/0333336 A1Viavi Solutions Inc.
- Systems, methods, and storage media for testing local loops of telecommunications networks3 Oct 2024US 2024/0333833 A1Level 3 Communications, LLC
- Detecting modem power state change8 Aug 2024US 2024/0267456 A1British Telecommunications Public Ltd.Co.
- Systems, methods, and storage media for testing local loops of telecommunications networks14 Sep 2023US 2023/0291829 A1Level 3 Communications, LLC
Most cited
By later US patents
- Loop extender with communications, control, and diagnostics109US 7,194,023 B22Wire, Inc. · 2007
- Test instrument for testing asymmetric digital subscriber lines103US 6,002,671 AFluke Corporation · 1999
- High speed multiple loop DSL system79US 7,639,596 B2Adaptive Spectrum and Signal Alignment, Inc. · 2009
- Adaptive pulse width time domain reflectometer73US 8,222,906 B22012
- Apparatus and method for qualifying telephones and other attached equipment for optimum DSL operation62US 6,014,425 AParadyne Corporation · 2000