H04R 2207/021
Diaphragm extensions, not necessarily integrally formed
Official title: Diaphragm extensions, not necessarily integrally formed, e.g. skirts, rims, flanges
H04R2207/021 (Diaphragm extensions, not necessarily integrally formed) appears on 115 US grants and 144 published applications in this corpus.
Search patents in H04R- Granted patents
- 115
- Published applications
- 144
- Assignees
- 87
- Inventors
- 307
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 1 | 0 |
| 2009 | 0 | 2 |
| 2010 | 1 | 1 |
| 2011 | 0 | 5 |
| 2012 | 2 | 4 |
| 2013 | 6 | 3 |
| 2014 | 3 | 0 |
| 2015 | 2 | 6 |
| 2016 | 6 | 6 |
| 2017 | 9 | 10 |
| 2018 | 8 | 11 |
| 2019 | 10 | 11 |
| 2020 | 7 | 10 |
| 2021 | 6 | 7 |
| 2022 | 7 | 14 |
| 2023 | 11 | 19 |
| 2024 | 10 | 10 |
| 2025 | 16 | 11 |
| 2026 | 4 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Non-planar diamond body for a speaker dome15 Sep 2026US 12,739,582 B2Element Six Technologies Limited
- Speaker12 May 2026US 12,627,931 B2Changzhou Amt Co., Ltd
- High-precision alignment features for audio transducers21 Apr 2026US 12,610,189 B2Sonos, Inc.
- Speaker17 Mar 2026US 12,581,242 B2Alps Alpine Co., Ltd.
- Piezoelectric transducer23 Dec 2025US 12,507,018 B2Infineon Technologies AG
- Loudspeaker20 Aug 2026US 2026/0247077 A1Merry Electronics (Suzhou) Co., Ltd.
- Loudspeaker20 Aug 2026US 2026/0247078 A1Merry Electronics (Suzhou) Co., Ltd.
- Electrodynamic mems loudspeaker13 Aug 2026US 2026/0238924 A1Zhejiang Normal University
- Speaker2 Jul 2026US 2026/0189854 A1AAC Microtech (Changzhou) Co., Ltd.
- Speaker and Electronic Device21 May 2026US 2026/0143279 A1Huawei Technologies Co., Ltd.
Most cited
By later US patents
- Electro acoustic transducer and loudspeaker26US 4,965,839 A1990
- Vibration plate of a speaker and method for producing same18US 5,556,464 ASumitomo Electric Industries, Ltd. · 1996
- Loudspeaker18US 5,602,930 AHarman-Motive Inc. · 1997
- System and method for a differential comb drive MEMS12US 9,611,135 B1Infineon Technologies AG · 2017
- Dome tweeter11US 10,506,346 B2Tymphany Acoustic Technology (Huizhou) Co., Ltd. · 2019