H04B 3/04
Control of transmission
Official title: Control of transmission; Equalising
H04B3/04 (Control of transmission) appears on 960 US grants and 699 published applications in this corpus.
Search patents in H04B- Granted patents
- 960
- Published applications
- 699
- Assignees
- 421
- Inventors
- 1,661
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 21 | 0 |
| 1977 | 34 | 0 |
| 1978 | 19 | 0 |
| 1979 | 12 | 0 |
| 1980 | 20 | 0 |
| 1981 | 19 | 0 |
| 1982 | 13 | 0 |
| 1983 | 7 | 0 |
| 1984 | 7 | 0 |
| 1985 | 11 | 0 |
| 1986 | 13 | 0 |
| 1987 | 5 | 0 |
| 1988 | 12 | 0 |
| 1989 | 9 | 0 |
| 1990 | 7 | 0 |
| 1991 | 3 | 0 |
| 1992 | 5 | 0 |
| 1993 | 4 | 0 |
| 1994 | 11 | 0 |
| 1995 | 8 | 0 |
| 1996 | 8 | 0 |
| 1997 | 4 | 0 |
| 1998 | 14 | 0 |
| 1999 | 7 | 0 |
| 2000 | 7 | 0 |
| 2001 | 9 | 5 |
| 2002 | 6 | 6 |
| 2003 | 14 | 9 |
| 2004 | 7 | 12 |
| 2005 | 8 | 17 |
| 2006 | 10 | 22 |
| 2007 | 12 | 21 |
| 2008 | 10 | 22 |
| 2009 | 21 | 22 |
| 2010 | 21 | 24 |
| 2011 | 15 | 23 |
| 2012 | 33 | 19 |
| 2013 | 28 | 25 |
| 2014 | 35 | 28 |
| 2015 | 36 | 34 |
| 2016 | 30 | 35 |
| 2017 | 46 | 48 |
| 2018 | 55 | 43 |
| 2019 | 51 | 58 |
| 2020 | 53 | 46 |
| 2021 | 39 | 42 |
| 2022 | 34 | 42 |
| 2023 | 38 | 33 |
| 2024 | 33 | 29 |
| 2025 | 23 | 20 |
| 2026 | 13 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Equalizer with all-pass filter delay22 Sep 2026US 12,744,695 B2Cisco Technology, Inc.
- Communication method, apparatus, and system11 Aug 2026US 12,706,786 B2Huawei Technologies Co., Ltd.
- Equalization training method and apparatus, and system11 Aug 2026US 12,706,787 B2Huawei Technologies Co., Ltd.
- Electronic tunable cable simulator11 Aug 2026US 12,707,021 B2ARRIS Enterprises LLC
- Tunning high speed link parameters4 Aug 2026US 12,700,891 B2Lenovo Global Technology (United States) Inc.
- Comprehensive System Design to Address the Needs for Virtual Segmentation of the Coaxial Cable Plant1 Oct 2026US 2026/0303397 A1HyperX Holdings LLC
- Equalizer circuit and calibration method therefor1 Oct 2026US 2026/0303416 A1Novatek Microelectronics Corp.
- Adaptive equalization circuit, adaptive equalization device, receiver, and adaptive equalization method30 Jul 2026US 2026/0222077 A1Ntt Innovative Devices Corporation
- Hybrid circuit with high linearity for single-ended and bi-directional transceiver and extracting method of inbound signal thereof23 Jul 2026US 2026/0213784 A1National Cheng Kung University
- Equalizer with all-pass filter delay9 Jul 2026US 2026/0197212 A1Cisco Technology, Inc.
Most cited
By later US patents
- Method and apparatus for launching a wave mode that mitigates interference475US 9,608,740 B2AT&T Intellectual Property I, L. P. · 2017
- Method and apparatus for responding to events affecting communications in a communication network473US 9,769,020 B2AT&T Intellectual Property I, L. P. · 2017
- Guided wave communication system with interference mitigation and methods for use therewith251US 10,355,745 B2AT&T Intellectual Property I, L. P. · 2019
- Method and device for disturbance suppression in a signal195US 6,522,707 B1Siemens Aktiengesellschaft · 2003
- Analog receive equalizer for digital-subscriber-line communications system165US 6,226,322 B1Texas Instruments Incorporated · 2001