H04B 3/237
Using two adaptive filters
Official title: {using two adaptive filters, e.g. for near end and for end echo cancelling}
H04B3/237 (Using two adaptive filters) appears on 98 US grants and 48 published applications in this corpus.
Search patents in H04B- Granted patents
- 98
- Published applications
- 48
- Assignees
- 81
- Inventors
- 200
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 4 | 0 |
| 1989 | 5 | 0 |
| 1990 | 8 | 0 |
| 1991 | 3 | 0 |
| 1992 | 4 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 3 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 2 |
| 2005 | 1 | 1 |
| 2006 | 1 | 1 |
| 2007 | 2 | 3 |
| 2008 | 1 | 2 |
| 2009 | 2 | 2 |
| 2010 | 3 | 1 |
| 2011 | 0 | 1 |
| 2012 | 1 | 1 |
| 2013 | 3 | 2 |
| 2014 | 1 | 4 |
| 2015 | 5 | 2 |
| 2016 | 3 | 3 |
| 2017 | 4 | 6 |
| 2018 | 6 | 3 |
| 2019 | 6 | 6 |
| 2020 | 4 | 2 |
| 2021 | 1 | 3 |
| 2022 | 1 | 2 |
| 2023 | 2 | 0 |
| 2024 | 2 | 0 |
| 2025 | 0 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Robust foreground/background filtering control for acoustic echo cancellation30 Jun 2026US 12,671,767 B2Dolby Laboratories Licensing Corporation
- Ethernet physical layer transceiver with non-linear neural network equalizers10 Dec 2024US 12,166,595 B2Marvell Asia Pte Ltd
- Segmented echo cancellation filter for use in full-duplex communication systems2 Jul 2024US 12,028,126 B1Ethernovia Inc.
- Method and apparatus for training a full-duplex communication link12 Dec 2023US 11,843,483 B2Marvell Asia Pte Ltd
- Segmented echo cancellation filter for use in full-duplex communication systems20 Jun 2023US 11,683,068 B1Ethernovia Inc.
- Robust foreground/background filtering control for acoustic echo cancellation15 May 2025US 2025/0159083 A1Dolby Laboratories Licensing Corporation
- Method and Apparatus for Training a Full-Duplex Communication Link4 Aug 2022US 2022/0247603 A1Marvell Asia Pte Ltd
- Ethernet physical layer transceiver with non-linear neural network equalizers28 Jul 2022US 2022/0239510 A1Marvell Asia Pte Ltd
- Distributed dynamic power savings for adaptive filters in a high-speed data channel15 Jul 2021US 2021/0218606 A1Marvell Asia Pte Ltd
- Echo cancellation in a multiport data transceiver18 Mar 2021US 2021/0083718 A1Vecima Networks Inc.
Most cited
By later US patents
- Modulation and equalization in an orthonormal time-frequency shifting communications system111US 8,976,851 B2Cohere Technologies, Inc. · 2015
- Digital echo canceller96US 4,903,247 AU. S. Philips Corporation · 1990
- High performance echo canceller for high speed modem95US 5,790,658 AAdvanced Micro Devices, Inc. · 1998
- Method and apparatus for reducing residual far-end echo in voice communication networks82US 5,587,998 AAT&T Corp. · 1996
- Hands free telecommunication apparatus and method72US 5,099,472 ANorthern Telecom Limited · 1992