H04R 2209/00
Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by
Official title: Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
H04R2209/00 (Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by) appears on 680 US grants and 817 published applications in this corpus.
Search patents in H04R- Granted patents
- 680
- Published applications
- 817
- Assignees
- 310
- Inventors
- 1,328
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 4 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 5 | 0 |
| 1995 | 6 | 0 |
| 1996 | 6 | 0 |
| 1997 | 7 | 0 |
| 1998 | 10 | 0 |
| 1999 | 6 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 1 |
| 2002 | 5 | 15 |
| 2003 | 4 | 9 |
| 2004 | 10 | 30 |
| 2005 | 9 | 23 |
| 2006 | 19 | 23 |
| 2007 | 9 | 20 |
| 2008 | 9 | 15 |
| 2009 | 9 | 26 |
| 2010 | 13 | 17 |
| 2011 | 19 | 21 |
| 2012 | 21 | 15 |
| 2013 | 17 | 21 |
| 2014 | 20 | 41 |
| 2015 | 25 | 34 |
| 2016 | 44 | 48 |
| 2017 | 40 | 39 |
| 2018 | 31 | 33 |
| 2019 | 39 | 32 |
| 2020 | 35 | 53 |
| 2021 | 39 | 42 |
| 2022 | 35 | 38 |
| 2023 | 36 | 51 |
| 2024 | 48 | 57 |
| 2025 | 40 | 69 |
| 2026 | 29 | 44 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H04R 2209/022Aspects regarding the stray flux internal or external to the magnetic circuitIndexing code217
- H04R 2209/024Manufacturing aspects of the magnetic circuit of loudspeaker or microphone transducersIndexing code159
- H04R 2209/041Voice coil arrangements comprising more than one voice coil unit on theIndexing code159
- H04R 2209/027Electrical or mechanical reduction of yoke vibrationIndexing code95
- H04R 2209/026Transducers having separately controllable opposing diaphragmsIndexing code82
- H04R 2209/021Reduction of eddy currents in the magnetic circuit of electrodynamic loudspeaker transducerIndexing code26
- H04R 2209/043Short circuited voice coils driven by inductionIndexing code15
Recent patents
- Speaker15 Sep 2026US 12,739,567 B2AAC Microtech (Changzhou) Co., Ltd.
- Multi-layer board actuator having a planar magnet and voice coil4 Aug 2026US 12,701,364 B2Apple Inc.
- Hybrid sound radiation device for vibrating a heavy-weight rigid plate at audio frequencies30 Jun 2026US 12,671,947 B2Sensonic Design Ireland Limited
- Transducers and manufacturing methods thereof23 Jun 2026US 12,666,205 B2Tymphany Hk Limited
- Speaker transducer16 Jun 2026US 12,659,671 B2Mayht Holding B.V.
- Speaker device3 Sep 2026US 2026/0261804 A1Sonos, Inc.
- Audio device, signal processing method, and display method27 Aug 2026US 2026/0255116 A1Sony Group Corporation
- System and method for a split-gap audio transducer13 Aug 2026US 2026/0238927 A1Tectonic Audio Labs, Inc.
- Sound Generator13 Aug 2026US 2026/0238928 A1AAC Microtech (Changzhou) Co., Ltd.
- Linear motor magnet assembly and loudspeaker unit6 Aug 2026US 2026/0230756 A1Mayht Holding B.V.
Most cited
By later US patents
- Loudspeaker system192US 4,504,704 APioneer Electronic Corporation · 1985
- Positionally sequenced loudspeaker system178US 8,284,982 B2Induction Speaker Technology, LLC · 2012
- Dual coil floating mass transducers137US 5,897,486 ASymphonix Devices, Inc. · 1999
- Dual coil floating mass transducers102US 6,475,134 B1Symphonix Devices, Inc. · 2002
- Acoustical receiver housing for hearing aids100US 7,181,035 B2Sonion Nederland B. V. · 2007