H04L 25/497
By correlative coding
Official title: by correlative coding, e.g. partial response coding or echo modulation coding {transmitters and receivers for partial response systems (transversal equalizers at the transmitter end H04L25/03343)}
H04L25/497 (By correlative coding) appears on 548 US grants and 370 published applications in this corpus.
Search patents in H04L- Granted patents
- 548
- Published applications
- 370
- Assignees
- 230
- Inventors
- 822
- Latest grant
- 4 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 10 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 4 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 6 | 0 |
| 1989 | 8 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 6 | 0 |
| 1993 | 13 | 0 |
| 1994 | 6 | 0 |
| 1995 | 13 | 0 |
| 1996 | 18 | 0 |
| 1997 | 7 | 0 |
| 1998 | 6 | 0 |
| 1999 | 8 | 0 |
| 2000 | 13 | 0 |
| 2001 | 19 | 13 |
| 2002 | 30 | 24 |
| 2003 | 16 | 23 |
| 2004 | 19 | 33 |
| 2005 | 23 | 42 |
| 2006 | 28 | 29 |
| 2007 | 28 | 21 |
| 2008 | 16 | 17 |
| 2009 | 20 | 14 |
| 2010 | 33 | 15 |
| 2011 | 14 | 11 |
| 2012 | 21 | 12 |
| 2013 | 15 | 13 |
| 2014 | 13 | 9 |
| 2015 | 20 | 13 |
| 2016 | 8 | 10 |
| 2017 | 12 | 6 |
| 2018 | 8 | 10 |
| 2019 | 13 | 14 |
| 2020 | 13 | 4 |
| 2021 | 9 | 6 |
| 2022 | 6 | 7 |
| 2023 | 4 | 9 |
| 2024 | 11 | 7 |
| 2025 | 8 | 6 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Communication systems and methods for transmitting and processing of data4 Nov 2025US 12,463,780 B2Intel Corporation
- High-speed signaling systems with adaptable pre-emphasis and equalization14 Oct 2025US 12,445,330 B2Rambus Inc.
- Scalable receiver architecture for silicon photonic links16 Sep 2025US 12,418,347 B2Intel Corporation
- Configurable correlator bank for a non-coherent DSSS demodulator9 Sep 2025US 12,413,464 B2Silicon Laboratories Inc.
- Adaptive channel equalization for a duo-binary transceiver8 Jul 2025US 12,355,596 B2Microsoft Technology Licensing, LLC
- Extended symbol decoding1 Oct 2026US 2026/0303419 A1Microchip Technology Incorporated
- Tomlinson-harashima precoding adaptation for channel equalization24 Sep 2026US 2026/0291787 A1QUALCOMM Incorporated
- Adaptive channel equalization for a duo-binary transceiver18 Sep 2025US 2025/0293904 A1Microsoft Technology Licensing, LLC
- Communication method and related apparatus7 Aug 2025US 2025/0253875 A1Huawei Technologies Co., Ltd.
- Spectral sharing wireless systems8 May 2025US 2025/0150130 A1Cohere Technologies, Inc.
Most cited
By later US patents
- Means and method for a synchronous network communications system357US 6,377,640 B2Stanford Syncom, Inc. · 2002
- Channel equalization system and method265US 6,904,110 B22005
- Reconfigurable radio system architecture185US 6,091,765 AHarris Corporation · 2000
- Partial response trellis decoder for high definition television (HDTV) system145US 5,508,752 ALG Electronics Inc. · 1996
- Digital communication system for transmitting and receiving robustly encoded data144US 6,996,133 B2Zenith Electronics Corporation · 2006