H04R 2209/026
Transducers having separately controllable opposing diaphragms
Official title: Transducers having separately controllable opposing diaphragms, e.g. for ring-tone and voice (H04R2400/03 takes precedence)
H04R2209/026 (Transducers having separately controllable opposing diaphragms) appears on 82 US grants and 110 published applications in this corpus.
Search patents in H04R- Granted patents
- 82
- Published applications
- 110
- Assignees
- 64
- Inventors
- 228
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1991 | 1 | 0 |
| 1992 | 0 | 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 | 6 |
| 2003 | 2 | 3 |
| 2004 | 5 | 6 |
| 2005 | 0 | 1 |
| 2006 | 3 | 5 |
| 2007 | 2 | 1 |
| 2008 | 0 | 2 |
| 2009 | 2 | 3 |
| 2010 | 2 | 1 |
| 2011 | 2 | 3 |
| 2012 | 1 | 0 |
| 2013 | 1 | 2 |
| 2014 | 2 | 2 |
| 2015 | 1 | 1 |
| 2016 | 2 | 2 |
| 2017 | 4 | 2 |
| 2018 | 1 | 0 |
| 2019 | 0 | 1 |
| 2020 | 2 | 3 |
| 2021 | 2 | 7 |
| 2022 | 6 | 8 |
| 2023 | 11 | 14 |
| 2024 | 15 | 16 |
| 2025 | 7 | 10 |
| 2026 | 8 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Speaker transducer16 Jun 2026US 12,659,671 B2Mayht Holding B.V.
- Linear motor magnet assembly and loudspeaker unit2 Jun 2026US 12,647,733 B2Mayht Holding B.V.
- Dual compression driver with internal magnets and annular exit26 May 2026US 12,641,364 B2Harman Professional, Inc.
- Speaker device26 May 2026US 12,641,375 B2Sonos, Inc.
- Systems and methods for stabilizing a playback device19 May 2026US 12,634,634 B2Sonos, Inc.
- Speaker device3 Sep 2026US 2026/0261804 A1Sonos, Inc.
- Linear motor magnet assembly and loudspeaker unit6 Aug 2026US 2026/0230756 A1Mayht Holding B.V.
- Electrodynamic loudspeaker with micro-electromechanical system30 Jul 2026US 2026/0222742 A1Zhejiang Normal University
- Speaker and headset9 Jul 2026US 2026/0197576 A1Honor Device Co., Ltd.
- Dual compression driver with inboard annular exit2 Jul 2026US 2026/0189852 A1Harman Professional, Inc.
Most cited
By later US patents
- Dual diaphragm electroacoustic transducer95US 7,912,240 B2Sonion Nederland B. V. · 2011
- Electroacoustic transducer mounting in shells of hearing prostheses85US 7,822,218 B2Sonion Nederland B. V. · 2010
- Compact high performance speaker60US 7,006,653 B22006
- Loudspeaker system42US 5,073,945 AMatsushita Electric Industrial Co., Ltd. · 1991
- Dual-frequency coaxial earphones with shared magnet31US 8,189,847 B2Jetvox Acoustic Corp. · 2012