H04R 7/24
Tensioning by means acting directly on free portions of diaphragm or cone
H04R7/24 (Tensioning by means acting directly on free portions of diaphragm or cone) appears on 107 US grants and 109 published applications in this corpus.
Search patents in H04R- Granted patents
- 107
- Published applications
- 109
- Assignees
- 67
- Inventors
- 224
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 2 |
| 2007 | 1 | 2 |
| 2008 | 0 | 6 |
| 2009 | 3 | 2 |
| 2010 | 0 | 3 |
| 2011 | 5 | 4 |
| 2012 | 2 | 3 |
| 2013 | 4 | 3 |
| 2014 | 3 | 7 |
| 2015 | 7 | 1 |
| 2016 | 4 | 6 |
| 2017 | 5 | 11 |
| 2018 | 8 | 9 |
| 2019 | 10 | 8 |
| 2020 | 7 | 8 |
| 2021 | 10 | 9 |
| 2022 | 10 | 6 |
| 2023 | 3 | 8 |
| 2024 | 3 | 4 |
| 2025 | 6 | 3 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Microelectromechanical acoustic component25 Aug 2026US 12,715,761 B2Robert Bosch GmbH
- Electro-acoustic transducer31 Mar 2026US 12,593,175 B2Kabushiki Kaisha Audio-Technica
- Audio-tactile transducer device based on dielectric electro-active elastomers13 Jan 2026US 12,526,582 B2Mateligent GmbH
- MEMS microphone chip30 Dec 2025US 12,513,468 B2Aac Acoustic Technologies (Shenzhen) Co., Ltd.
- Vibration sensor25 Nov 2025US 12,483,824 B2Shenzhen Shokz Co., Ltd.
- Electoacoustic transducer17 Sep 2026US 2026/0281623 A1
- Electroacoustic transductor structure6 Aug 2026US 2026/0230755 A1Aac Kaitai Technologies (Wuhan) Co., Ltd
- Semiconductor structure and fabrication method thereof26 Mar 2026US 2026/0089446 A1United Microelectronics Corp.
- Mems device16 Oct 2025US 2025/0324202 A1Infineon Technologies AG
- Directional microphone7 Aug 2025US 2025/0250158 A1
Most cited
By later US patents
- Electrostatic transducer having narrowed directional characteristic44US 4,081,626 APolaroid Corporation · 1978
- Integrated acoustic transducer obtained using MEMS technology, and corresponding manufacturing process32US 8,942,394 B2STMicroelectronics S,r.l. · 2015
- Audio speaker25US 4,924,504 AHighwood Audio Inc. · 1990
- Conical loudspeaker having a conical stabilizing element joined between an underside of a speaker membrane and an outside surface of a speaker moving coil carrier25US 5,323,469 ANokia (Deutschland) GmbH · 1994
- Piezoelectric microphone fabricated on glass15US 8,724,832 B2QUALCOMM MEMS Technologies, Inc. · 2014