H03H 7/427
Common-mode filters
Official title: {Common-mode filters (H02J3/01 and H02M1/126 takes precedence)}
H03H7/427 (Common-mode filters) appears on 358 US grants and 362 published applications in this corpus.
Search patents in H03H- Granted patents
- 358
- Published applications
- 362
- Assignees
- 221
- Inventors
- 737
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 4 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 6 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 4 | 0 |
| 2000 | 7 | 0 |
| 2001 | 4 | 0 |
| 2002 | 3 | 6 |
| 2003 | 4 | 9 |
| 2004 | 3 | 7 |
| 2005 | 6 | 6 |
| 2006 | 10 | 8 |
| 2007 | 5 | 10 |
| 2008 | 5 | 11 |
| 2009 | 7 | 12 |
| 2010 | 5 | 9 |
| 2011 | 6 | 16 |
| 2012 | 10 | 2 |
| 2013 | 12 | 13 |
| 2014 | 12 | 28 |
| 2015 | 17 | 30 |
| 2016 | 25 | 29 |
| 2017 | 22 | 33 |
| 2018 | 31 | 25 |
| 2019 | 37 | 23 |
| 2020 | 17 | 15 |
| 2021 | 19 | 21 |
| 2022 | 18 | 11 |
| 2023 | 12 | 8 |
| 2024 | 12 | 10 |
| 2025 | 10 | 12 |
| 2026 | 1 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Laminated common mode filter31 Mar 2026US 12,592,336 B2Amotech Co., Ltd.
- Active filter device and electric compressor comprising same16 Dec 2025US 12,500,574 B2Sanden Corporation
- Divided active electromagnetic interference filter module and manufacturing method thereof11 Nov 2025US 12,470,189 B2Em Coretech Inc.
- Radio frequency interference common mode injection in a C-PHY receiver8 Jul 2025US 12,353,350 B2QUALCOMM Incorporated
- Noise filter8 Jul 2025US 12,355,346 B2Mitsubishi Electric Corporation
- Power-Over Data Line Communication Device and Power-Over Data Line Communication System9 Jul 2026US 2026/0197208 A1Astemo, Ltd.
- Multilayer common mode filter18 Jun 2026US 2026/0171298 A1Amotech Co., Ltd.
- Filter circuit and filter of direct-current power supply, electric drive controller, and vehicle4 Jun 2026US 2026/0155737 A1Viridi E-Mobility Technology (Ningbo) Co., Ltd.
- Communication device4 Jun 2026US 2026/0155804 A1Panasonic Automotive Systems Co., Ltd.
- Multilayered common mode filter23 Apr 2026US 2026/0113013 A1Amotech Co., Ltd.
Most cited
By later US patents
- In-line module for attenuating electrical noise with male and female blade terminals315US 5,982,253 ANartron Corporation · 1999
- Filtered connector/adaptor for unshielded twisted pair wiring145US 5,346,410 ATandem Computers Incorporated · 1994
- Power line filter and surge protection circuit components and circuits104US 5,142,430 A1992
- Combined differential-mode common-mode noise filter95US 5,321,373 ADigital Equipment Corporation · 1994
- End cap assembly and electrical motor utilizing same88US 6,078,117 ANartron Corporation · 2000