H04R 2209/021
Reduction of eddy currents in the magnetic circuit of electrodynamic loudspeaker transducer
H04R2209/021 (Reduction of eddy currents in the magnetic circuit of electrodynamic loudspeaker transducer) appears on 26 US grants and 32 published applications in this corpus.
Search patents in H04R- Granted patents
- 26
- Published applications
- 32
- Assignees
- 25
- Inventors
- 59
- Latest grant
- 6 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 1 |
| 2008 | 2 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 1 | 0 |
| 2013 | 1 | 2 |
| 2014 | 2 | 4 |
| 2015 | 2 | 4 |
| 2016 | 2 | 1 |
| 2017 | 2 | 3 |
| 2018 | 1 | 3 |
| 2019 | 2 | 3 |
| 2020 | 1 | 2 |
| 2021 | 3 | 1 |
| 2022 | 2 | 0 |
| 2023 | 0 | 3 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Electronic device including speaker6 Jan 2026US 12,520,073 B2Samsung Electronics Co., Ltd.
- Magnetic circuit for acoustic transducer, and speaker unit23 Sep 2025US 12,425,775 B2Yamaha Corporation
- Double voice coil loudspeaker transducer unit29 Mar 2022US 11,290,823 B2Dali A/S
- Electric motor4 Jan 2022US 11,218,810 B2
- Electric motor9 Nov 2021US 11,172,308 B2
- Electroacoustic transducer5 Dec 2024US 2024/0406637 A1Kabushiki Kaisha Audio-Technica
- Magnetic circuit for acoustic transducer, and speaker unit28 Dec 2023US 2023/0421962 A1Yamaha Corporation
- Electronic device including speaker24 Aug 2023US 2023/0269522 A1Samsung Electronics Co., Ltd.
- Improvements in and relating to loudspeaker magnet assemblies20 Apr 2023US 2023/0117602 A1
- Double Voice Coil Loudspeaker Transducer Unit28 Jan 2021US 2021/0029463 A1Dali A/S
Most cited
By later US patents
- Speaker having magnetic circuit38US 5,715,324 AAlpine Electronics, Inc. · 1998
- Electric motor23US 10,375,479 B22019
- Distortion reduction in loudspeakers14US 5,357,587 A1994
- Electrodynamic transducer and use thereof in loudspeakers and geophones7US 8,111,870 B2Universite Du Maine · 2012
- Acoustic transducer7US 9,241,213 B2Harman Becker Gepkocsirendszer Gyarto Korlatolt Felelossegu Tarsasag · 2016