H01F 19/06
Broad-band transformers
Official title: Broad-band transformers, e.g. suitable for handling frequencies well down into the audio range
H01F19/06 (Broad-band transformers) appears on 22 US grants and 25 published applications in this corpus.
Search patents in H01F- Granted patents
- 22
- Published applications
- 25
- Assignees
- 21
- Inventors
- 58
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 1 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 1 |
| 2008 | 0 | 2 |
| 2009 | 0 | 1 |
| 2010 | 2 | 1 |
| 2011 | 0 | 2 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 1 |
| 2015 | 0 | 0 |
| 2016 | 1 | 1 |
| 2017 | 2 | 2 |
| 2018 | 0 | 1 |
| 2019 | 2 | 3 |
| 2020 | 2 | 0 |
| 2021 | 1 | 2 |
| 2022 | 1 | 1 |
| 2023 | 1 | 3 |
| 2024 | 1 | 1 |
| 2025 | 1 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Digital isolator9 Jun 2026US 12,651,963 B2Silergy Semiconductor Technology (Hangzhou) LTD
- Transformer device1 Apr 2025US 12,266,463 B2Realtek Semiconductor Corp.
- Coil device, phase shift circuit, and communication apparatus16 Apr 2024US 11,961,651 B2Murata Manufacturing Co., Ltd.
- Matching circuit, matching circuit element, and communication device3 Oct 2023US 11,777,466 B2Murata Manufacturing Co., Ltd.
- Triple inductor transformer for multiband radio frequency integrated circuits19 Jul 2022US 11,393,619 B2QUALCOMM Incorporated
- Impedance adaptor26 Jun 2025US 2025/0210836 A1Sat-Com (Pty) Ltd
- Transformer and radio frequency module3 Oct 2024US 2024/0333238 A1Murata Manufacturing Co., Ltd.
- Digital isolator7 Sep 2023US 2023/0283173 A1Silergy Semiconductor Technology (Hangzhou) LTD
- Signal coupling device10 Aug 2023US 2023/0253148 A1Quantage, Inc.
- Electromagnetic wave shielding filter9 Feb 2023US 2023/0037631 A1
Most cited
By later US patents
- Balun transformer, mounting structure of balun transformer, and electronic apparatus having built-in mounting structure12US 7,656,262 B2Sony Corporation · 2010
- Switching mode power transformer11US 5,103,201 AVogt Electronic AG · 1992
- Embedded magnetic component transformer device9US 10,573,457 B2Murata Manufacturing Co., Ltd. · 2020
- Multilayer transformer component8US 7,772,956 B2Murata Manufacturing Co., Ltd. · 2010
- Distributed balun with a non-unity impedance ratio6US 7,199,682 B2STMicroelectronics S.r.l. · 2007