H04L 25/12
Compensating for variations in line impedance
H04L25/12 (Compensating for variations in line impedance) appears on 92 US grants and 59 published applications in this corpus.
Search patents in H04L- Granted patents
- 92
- Published applications
- 59
- Assignees
- 58
- Inventors
- 147
- Latest grant
- 13 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 3 |
| 2002 | 4 | 1 |
| 2003 | 4 | 3 |
| 2004 | 2 | 1 |
| 2005 | 2 | 3 |
| 2006 | 3 | 2 |
| 2007 | 1 | 2 |
| 2008 | 4 | 3 |
| 2009 | 3 | 3 |
| 2010 | 2 | 0 |
| 2011 | 1 | 2 |
| 2012 | 4 | 2 |
| 2013 | 1 | 1 |
| 2014 | 2 | 4 |
| 2015 | 3 | 1 |
| 2016 | 0 | 3 |
| 2017 | 4 | 3 |
| 2018 | 1 | 3 |
| 2019 | 9 | 7 |
| 2020 | 6 | 3 |
| 2021 | 3 | 4 |
| 2022 | 1 | 1 |
| 2023 | 3 | 1 |
| 2024 | 1 | 1 |
| 2025 | 1 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Transmission circuit, transmission method and transmission and reception system13 Jan 2026US 12,526,176 B2Fitipower Integrated Technology, Inc.
- Orthogonal impedance tuning and feed forward equalization for segmented multiple level SST transmitter30 Dec 2025US 12,513,028 B2International Business Machines Corporation
- Broadband diplexed or multiplexed power amplifier27 Feb 2024US 11,916,522 B2Massachusetts Institute of Technology
- Circuits for intermediate-frequency-filterless, double-conversion receivers18 Jul 2023US 11,705,932 B2The Trustees of Columbia University in the City of New York
- Circuit for a bus system and method for operating a circuit21 Feb 2023US 11,585,834 B2Robert Bosch GmbH
- Bus capacitance reduction for controller area network transceiver4 Dec 2025US 2025/0373248 A1Texas Instruments Incorporated
- Transmission Circuit, Transmission Method and Transmission and Reception System13 Nov 2025US 2025/0350510 A1Fitipower Integrated Technology, Inc.
- Orthogonal impedance tuning and feed forward equalization for segmented multiple level sst transmitter12 Dec 2024US 2024/0414034 A1International Business Machines Corporation
- Communication channel calibration for drift conditions13 Jul 2023US 2023/0224101 A1Rambus Inc.
- Communication channel calibration for drift conditions17 Feb 2022US 2022/0052802 A1Rambus Inc.
Most cited
By later US patents
- High-speed digital distribution system164US 6,449,308 B1Intel Corporation · 2002
- Symbol-based signaling device for an electromagnetically-coupled bus system142US 7,075,996 B2Intel Corporation · 2006
- Transmission of FM video signals over various lines129US 5,818,127 AVideocom, Inc. · 1998
- Automatic system for adjusting the output impedance of fast CMOS drivers53US 5,095,231 ACSELT - Centro Studi e Laboratori Telecomunicazioni S.p.A. · 1992
- Communication channel calibration for drift conditions48US 7,095,789 B2Rambus Inc. · 2006