H04B 3/231
Echo cancellers using readout of a memory to provide the echo replica
Official title: {Echo cancellers using readout of a memory to provide the echo replica}
H04B3/231 (Echo cancellers using readout of a memory to provide the echo replica) appears on 66 US grants and 25 published applications in this corpus.
Search patents in H04B- Granted patents
- 66
- Published applications
- 25
- Assignees
- 47
- Inventors
- 136
- Latest grant
- 1 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 5 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 5 | 0 |
| 1990 | 5 | 0 |
| 1991 | 4 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 1 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 3 |
| 2008 | 2 | 2 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 2 | 1 |
| 2014 | 1 | 2 |
| 2015 | 2 | 2 |
| 2016 | 2 | 1 |
| 2017 | 2 | 0 |
| 2018 | 1 | 1 |
| 2019 | 2 | 3 |
| 2020 | 4 | 1 |
| 2021 | 0 | 1 |
| 2022 | 2 | 2 |
| 2023 | 3 | 1 |
| 2024 | 1 | 1 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Link training for a full-duplex ethernet link1 Apr 2025US 12,267,122 B2Marvell Asia Pte Ltd
- Segmented echo cancellation filter for use in full-duplex communication systems2 Jul 2024US 12,028,126 B1Ethernovia Inc.
- Echo cancellation device and echo cancellation method thereof applied in communication device26 Dec 2023US 11,855,710 B2Faraday Technology Corp.
- Segmented echo cancellation filter for use in full-duplex communication systems20 Jun 2023US 11,683,068 B1Ethernovia Inc.
- Echo canceller system and echo cancelling method28 Mar 2023US 11,616,530 B2Realtek Semiconductor Corp.
- Link Training for a Full-Duplex Ethernet Link26 Jun 2025US 2025/0211283 A1Marvell Asia Pte Ltd
- Techniques for power efficient and smart echo cancellation5 Dec 2024US 2024/0405799 A1Huawei Technologies Co., Ltd.
- Link Training for a Full-Duplex Ethernet Link16 Feb 2023US 2023/0050128 A1Marvell Asia Pte Ltd
- Echo canceller system and echo cancelling method11 Aug 2022US 2022/0255583 A1Realtek Semiconductor Corp.
- Echo cancellation device and echo cancellation method thereof applied in communication device30 Jun 2022US 2022/0209818 A1Faraday Technology Corp.
Most cited
By later US patents
- Dual mode LMS nonlinear data echo canceller64US 4,977,591 ANynex Corporation · 1990
- Multirate wire line modem apparatus63US 5,177,734 AITT Corporation · 1993
- Adaptive digital filter including low-pass filter61US 5,146,470 AFujitsu Limited · 1992
- Non-linear echo cancellation of data signals51US 4,669,116 AThe Regents of the University of California · 1987
- Echo canceller49US 4,682,358 AAmerican Telephone and Telegraph Company · 1987