H01F 27/33
Arrangements for noise damping
H01F27/33 (Arrangements for noise damping) appears on 184 US grants and 194 published applications in this corpus.
Search patents in H01F- Granted patents
- 184
- Published applications
- 194
- Assignees
- 135
- Inventors
- 488
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 5 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 4 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 5 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 3 | 1 |
| 2003 | 4 | 0 |
| 2004 | 0 | 2 |
| 2005 | 0 | 0 |
| 2006 | 0 | 4 |
| 2007 | 1 | 8 |
| 2008 | 4 | 4 |
| 2009 | 0 | 2 |
| 2010 | 1 | 6 |
| 2011 | 4 | 5 |
| 2012 | 9 | 4 |
| 2013 | 4 | 11 |
| 2014 | 6 | 4 |
| 2015 | 4 | 10 |
| 2016 | 6 | 10 |
| 2017 | 10 | 14 |
| 2018 | 7 | 15 |
| 2019 | 10 | 8 |
| 2020 | 7 | 14 |
| 2021 | 12 | 9 |
| 2022 | 7 | 10 |
| 2023 | 6 | 10 |
| 2024 | 10 | 13 |
| 2025 | 11 | 17 |
| 2026 | 4 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Transformer arrangement4 Aug 2026US 12,700,536 B2Hitachi Energy Ltd
- Noise/vibration reduction device for transformers14 Jul 2026US 12,683,071 B2Hyosung Heavy Industries Corporation
- Transformer arrangement12 May 2026US 12,626,857 B2Hitachi Energy Ltd
- Winding, a transformer and a transformer arrangement3 Feb 2026US 12,542,235 B2Hitachi Energy Ltd
- Coil component18 Nov 2025US 12,476,043 B2Samsung Electro-Mechanics Co., Ltd.
- Quick assembly common mode filter10 Sep 2026US 2026/0269121 A1Tai-Tech Advanced Electronics Co., Ltd.
- Cooling arrangement and method for cooling at least one oil-to-air external heat exchanger6 Aug 2026US 2026/0227131 A1Hitachi Energy Ltd
- Common mode filter circuit with cooler30 Jul 2026US 2026/0221329 A1IHI Corporation
- Transformer transport plate and transformer transport device including same23 Jul 2026US 2026/0208958 A1Hd Hyundai Electric Co., Ltd.
- Coil component2 Jul 2026US 2026/0188555 A1Samsung Electro-Mechanics Co., Ltd.
Most cited
By later US patents
- Power inductor and transformer with low acoustic noise air gap70US 4,047,138 AGeneral Electric Company · 1977
- Electric noise absorber58US 5,355,109 AKitagawa Industries Co., Ltd. · 1994
- Heat exchanger for cooling electrical power apparatus57US 4,266,602 AWestinghouse Electric Corp. · 1981
- Electric noise absorber57US 4,972,167 AKitagawa Industries Co., Ltd. · 1990
- Ferrite suppressor case with retaining fingers50US 5,003,278 AFerriShield, Inc. · 1991