H04R 7/02
Diaphragms for electromechanical transducers: characterised by the construction
Official title: characterised by the construction
H04R7/02 (Diaphragms for electromechanical transducers: characterised by the construction) appears on 3,590 US grants and 4,244 published applications in this corpus.
Search patents in H04R- Granted patents
- 3,590
- Published applications
- 4,244
- Assignees
- 980
- Inventors
- 5,237
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 10 | 0 |
| 1978 | 11 | 0 |
| 1979 | 11 | 0 |
| 1980 | 6 | 0 |
| 1981 | 11 | 0 |
| 1982 | 19 | 0 |
| 1983 | 15 | 0 |
| 1984 | 18 | 0 |
| 1985 | 13 | 0 |
| 1986 | 11 | 0 |
| 1987 | 7 | 0 |
| 1988 | 9 | 0 |
| 1989 | 15 | 0 |
| 1990 | 12 | 0 |
| 1991 | 15 | 0 |
| 1992 | 11 | 0 |
| 1993 | 10 | 0 |
| 1994 | 14 | 0 |
| 1995 | 11 | 0 |
| 1996 | 3 | 0 |
| 1997 | 11 | 0 |
| 1998 | 13 | 0 |
| 1999 | 13 | 0 |
| 2000 | 18 | 0 |
| 2001 | 42 | 28 |
| 2002 | 34 | 57 |
| 2003 | 43 | 38 |
| 2004 | 34 | 61 |
| 2005 | 26 | 66 |
| 2006 | 38 | 77 |
| 2007 | 40 | 75 |
| 2008 | 30 | 52 |
| 2009 | 35 | 61 |
| 2010 | 39 | 55 |
| 2011 | 39 | 63 |
| 2012 | 66 | 60 |
| 2013 | 58 | 72 |
| 2014 | 53 | 104 |
| 2015 | 108 | 172 |
| 2016 | 126 | 178 |
| 2017 | 160 | 199 |
| 2018 | 173 | 259 |
| 2019 | 241 | 261 |
| 2020 | 253 | 410 |
| 2021 | 308 | 281 |
| 2022 | 250 | 324 |
| 2023 | 252 | 384 |
| 2024 | 334 | 402 |
| 2025 | 312 | 277 |
| 2026 | 200 | 228 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Balanced offset force cancellation using bass and full range transducers6 Oct 2026US 12,756,980 B2Apple Inc.
- Sound device6 Oct 2026US 12,756,981 B2AAC Microtech (Changzhou) Co., Ltd.
- Loudspeaker and loudspeaker manufacturing method29 Sep 2026US 12,750,614 B2Panasonic Automotive Systems Co., Ltd.
- Micro speaker structure including diaphragm with locally thinner regions and method for forming the same22 Sep 2026US 12,745,043 B2Fortemedia, Inc.
- Ultrasonic transducer and parametric speaker including the same22 Sep 2026US 12,745,046 B2Murata Manufacturing Co., Ltd.
- Loudspeaker drive unit8 Oct 2026US 2026/0313287 A1Genelec Oy
- Full-bandwidth dual-sided speaker device8 Oct 2026US 2026/0313288 A1Merry Electronics (Suzhou) Co., Ltd.
- Loudspeaker with phase plug8 Oct 2026US 2026/0313292 A1Ask Industries Societa' Per Azioni
- Devices, systems and methods relating to audio transducers and audio devices8 Oct 2026US 2026/0313296 A1Wing Acoustics Limited
- Thin balanced armature receiver8 Oct 2026US 2026/0313297 A1Knowles Electronics, LLC
Most cited
By later US patents
- Multimedia personal computer with active noise reduction and piezo speakers298US 5,828,768 ANoise Cancellation Technologies, Inc. · 1998
- Acoustic device295US 6,332,029 B1New Transducers Limited · 2001
- Acoustic device206US 7,158,647 B2New Transducers Limited · 2007
- Ultra low frequency transducer and loud speaker comprising same205US 6,611,604 B1Stillwater Designs and Audio, Inc. · 2003
- Positionally sequenced loudspeaker system178US 8,284,982 B2Induction Speaker Technology, LLC · 2012