H04B 3/30
Reducing interference caused by unbalanced currents in a normally balanced line
H04B3/30 (Reducing interference caused by unbalanced currents in a normally balanced line) appears on 208 US grants and 186 published applications in this corpus.
Search patents in H04B- Granted patents
- 208
- Published applications
- 186
- Assignees
- 135
- Inventors
- 418
- Latest grant
- 12 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 1 |
| 2003 | 3 | 1 |
| 2004 | 2 | 4 |
| 2005 | 1 | 8 |
| 2006 | 4 | 5 |
| 2007 | 4 | 5 |
| 2008 | 7 | 5 |
| 2009 | 4 | 5 |
| 2010 | 5 | 12 |
| 2011 | 5 | 13 |
| 2012 | 17 | 8 |
| 2013 | 11 | 9 |
| 2014 | 8 | 9 |
| 2015 | 13 | 14 |
| 2016 | 15 | 14 |
| 2017 | 12 | 14 |
| 2018 | 13 | 4 |
| 2019 | 14 | 18 |
| 2020 | 16 | 10 |
| 2021 | 12 | 9 |
| 2022 | 7 | 4 |
| 2023 | 7 | 7 |
| 2024 | 6 | 4 |
| 2025 | 3 | 2 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Transmission circuit, electronic control unit, and vehicle12 Aug 2025US 12,388,476 B2Rohm Co., Ltd.
- Power line communication system, power electronic apparatus, and interference suppression method27 May 2025US 12,316,399 B2Huawei Digital Power Technologies Co., Ltd.
- Electronic control device11 Feb 2025US 12,224,886 B2Hitachi Astemo, Ltd.
- Building, transmitting, and receiving frame structures in power line communications24 Dec 2024US 12,177,323 B2Texas Instruments Incorporated
- Communication apparatus10 Sep 2024US 12,088,318 B2Autonetworks Technologies, Ltd.
- Active inductive impedance enhancement circuit applied to power line path2 Jul 2026US 2026/0189213 A1HK Oceancomm Technology Co., Limited
- Signal transmission device and signal transmission system3 Jul 2025US 2025/0219626 A1Hitachi Astemo, Ltd.
- Building, transmitting, and receiving frame structures in power line communications13 Mar 2025US 2025/0088576 A1Texas Instruments Incorporated
- In-phase noise suppression device18 Apr 2024US 2024/0128947 A1Empass Technology Inc.
- Power line communication system, power electronic apparatus, and interference suppression method8 Feb 2024US 2024/0048179 A1Huawei Digital Power Technologies Co., Ltd.
Most cited
By later US patents
- Multichannel interfacing device having a termination circuit221US 8,222,919 B2Excem · 2012
- Crosstalk cancellation for a common-mode channel136US 8,442,099 B1Aquantia Corporation · 2013
- Method and apparatus for RF common-mode noise rejection in a DSL receiver132US 6,459,739 B1Tioga Technologies Inc. · 2002
- Common mode current cancellation in twisted pairs106US 5,587,692 ATut Systems, Inc. · 1996
- Transmission system for reduction of amateur radio interference69US 6,522,699 B1Nortel Networks Limited · 2003