H04R 7/04
Plane diaphragms
H04R7/04 (Plane diaphragms) appears on 2,498 US grants and 3,049 published applications in this corpus.
Search patents in H04R- Granted patents
- 2,498
- Published applications
- 3,049
- Assignees
- 703
- Inventors
- 3,811
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 4 | 0 |
| 1980 | 2 | 0 |
| 1981 | 7 | 0 |
| 1982 | 8 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 4 | 0 |
| 1986 | 5 | 0 |
| 1987 | 4 | 0 |
| 1988 | 5 | 0 |
| 1989 | 5 | 0 |
| 1990 | 4 | 0 |
| 1991 | 7 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 4 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 6 | 0 |
| 1998 | 6 | 0 |
| 1999 | 4 | 0 |
| 2000 | 13 | 0 |
| 2001 | 33 | 26 |
| 2002 | 25 | 39 |
| 2003 | 30 | 27 |
| 2004 | 21 | 48 |
| 2005 | 22 | 43 |
| 2006 | 28 | 47 |
| 2007 | 28 | 42 |
| 2008 | 21 | 30 |
| 2009 | 18 | 38 |
| 2010 | 23 | 29 |
| 2011 | 26 | 34 |
| 2012 | 36 | 28 |
| 2013 | 31 | 51 |
| 2014 | 29 | 81 |
| 2015 | 72 | 132 |
| 2016 | 111 | 127 |
| 2017 | 108 | 110 |
| 2018 | 111 | 177 |
| 2019 | 160 | 178 |
| 2020 | 180 | 304 |
| 2021 | 231 | 218 |
| 2022 | 191 | 237 |
| 2023 | 187 | 306 |
| 2024 | 270 | 332 |
| 2025 | 247 | 195 |
| 2026 | 153 | 170 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Sound device6 Oct 2026US 12,756,981 B2AAC Microtech (Changzhou) 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.
- Apparatus15 Sep 2026US 12,739,565 B2LG Display Co., Ltd.
- Speaker15 Sep 2026US 12,739,567 B2AAC Microtech (Changzhou) Co., Ltd.
- Full-bandwidth dual-sided speaker device8 Oct 2026US 2026/0313288 A1Merry Electronics (Suzhou) Co., Ltd.
- 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
- Loudspeakers and methods of use thereof8 Oct 2026US 2026/0313298 A1Clean Energy Labs, LLC
- Manufacturing a microphone by bonding layers1 Oct 2026US 2026/0296881 A1InvenSense, Inc.
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
- MEMS process and device157US 7,781,249 B2Wolfson Microelectronics plc · 2010
- MEMS process and device117US 7,856,804 B2Wolfson Microelectronics plc · 2010