H04R 2231/00
Details of apparatus or processes specially adapted for the manufacture of transducers
Official title: Details of apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor covered by H04R31/00, not provided for in its subgroups
H04R2231/00 (Details of apparatus or processes specially adapted for the manufacture of transducers) appears on 200 US grants and 221 published applications in this corpus.
Search patents in H04R- Granted patents
- 200
- Published applications
- 221
- Assignees
- 119
- Inventors
- 458
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 4 | 1 |
| 2002 | 0 | 2 |
| 2003 | 1 | 3 |
| 2004 | 2 | 3 |
| 2005 | 1 | 2 |
| 2006 | 2 | 1 |
| 2007 | 0 | 6 |
| 2008 | 0 | 2 |
| 2009 | 1 | 1 |
| 2010 | 3 | 5 |
| 2011 | 2 | 11 |
| 2012 | 8 | 8 |
| 2013 | 5 | 6 |
| 2014 | 7 | 8 |
| 2015 | 9 | 18 |
| 2016 | 11 | 20 |
| 2017 | 25 | 22 |
| 2018 | 14 | 14 |
| 2019 | 19 | 18 |
| 2020 | 15 | 17 |
| 2021 | 12 | 10 |
| 2022 | 9 | 8 |
| 2023 | 6 | 11 |
| 2024 | 6 | 6 |
| 2025 | 10 | 9 |
| 2026 | 4 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Diaphragm, sound generation device, and method for manufacturing sound generation device11 Aug 2026US 12,707,216 B2LG Electronics Inc.
- Vibration module, speaker having the same, and manufacturing method thereof2 Jun 2026US 12,647,730 B2Tymphany Hk Limited
- Systems and methods for stabilizing a playback device19 May 2026US 12,634,634 B2Sonos, Inc.
- Loudspeaker17 Mar 2026US 12,581,241 B2Panasonic Automotive Systems Co., Ltd.
- Diaphragm with deformation structures to reduce vibration magnitude at resonance frequency23 Dec 2025US 12,507,012 B2Glass Acoustic Innovations Co., Ltd.
- Coaxial Speaker20 Aug 2026US 2026/0247079 A1AAC Microtech (Changzhou) Co., Ltd.
- Electroacoustic transductor structure6 Aug 2026US 2026/0230755 A1Aac Kaitai Technologies (Wuhan) Co., Ltd
- Micro-electro mechanical system microphone30 Jul 2026US 2026/0217521 A1AAC Technologies PTE.Ltd.
- Speaker Structure25 Jun 2026US 2026/0181310 A1Aac Kaitai Technologies (Wuhan) Co., Ltd
- Sound-generating device and manufacturing method therefor, and display apparatus25 Jun 2026US 2026/0181333 A1Boe Technology Group Co., Ltd.
Most cited
By later US patents
- Acoustic diaphragm and method for producing same51US 5,274,199 ASony Corporation · 1993
- Acoustic diaphragm with polyurethane elastomer coating47US 4,140,203 AMatsushita Electric Industrial Co., Ltd. · 1979
- Diaphragm for use with an electro-acoustic transducer and method of producing the same39US 5,521,886 ASony Corporation · 1996
- Diaphragm-edge integral moldings for speakers and acoustic transducers comprising same37US 5,744,761 AMatsushita Electric Industrial Co., Ltd. · 1998
- Speaker and manufacturing method therefor21US 5,111,510 APioneer Electronic Corporation · 1992