H04R 9/04
Construction, mounting, or centering of coil
H04R9/04 (Construction, mounting, or centering of coil) appears on 1,852 US grants and 2,078 published applications in this corpus.
Search patents in H04R- Granted patents
- 1,852
- Published applications
- 2,078
- Assignees
- 580
- Inventors
- 2,525
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 10 | 0 |
| 1978 | 6 | 0 |
| 1979 | 5 | 0 |
| 1980 | 10 | 0 |
| 1981 | 10 | 0 |
| 1982 | 17 | 0 |
| 1983 | 12 | 0 |
| 1984 | 13 | 0 |
| 1985 | 11 | 0 |
| 1986 | 8 | 0 |
| 1987 | 3 | 0 |
| 1988 | 6 | 0 |
| 1989 | 12 | 0 |
| 1990 | 7 | 0 |
| 1991 | 8 | 0 |
| 1992 | 8 | 0 |
| 1993 | 9 | 0 |
| 1994 | 5 | 0 |
| 1995 | 8 | 0 |
| 1996 | 7 | 0 |
| 1997 | 10 | 0 |
| 1998 | 14 | 0 |
| 1999 | 6 | 0 |
| 2000 | 8 | 0 |
| 2001 | 25 | 10 |
| 2002 | 16 | 27 |
| 2003 | 21 | 18 |
| 2004 | 22 | 51 |
| 2005 | 21 | 39 |
| 2006 | 23 | 55 |
| 2007 | 30 | 53 |
| 2008 | 23 | 37 |
| 2009 | 21 | 51 |
| 2010 | 27 | 32 |
| 2011 | 37 | 57 |
| 2012 | 51 | 49 |
| 2013 | 49 | 45 |
| 2014 | 38 | 45 |
| 2015 | 49 | 71 |
| 2016 | 70 | 76 |
| 2017 | 86 | 89 |
| 2018 | 78 | 96 |
| 2019 | 93 | 94 |
| 2020 | 111 | 154 |
| 2021 | 119 | 111 |
| 2022 | 89 | 135 |
| 2023 | 92 | 165 |
| 2024 | 170 | 229 |
| 2025 | 154 | 167 |
| 2026 | 117 | 122 |
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.
- 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.
- Dust cap illumination15 Sep 2026US 12,739,547 B2Harman International Industries, Incorporated
- Apparatus15 Sep 2026US 12,739,565 B2LG Display Co., Ltd.
- Full-bandwidth dual-sided speaker device8 Oct 2026US 2026/0313288 A1Merry Electronics (Suzhou) Co., Ltd.
- Full-bandwidth dual-sided speaker device1 Oct 2026US 2026/0304025 A1Merry Electronics (Suzhou) Co., Ltd.
- Full-bandwidth dual-sided speaker device1 Oct 2026US 2026/0304026 A1Merry Electronics (Suzhou) Co., Ltd.
- Transducer devices1 Oct 2026US 2026/0304031 A1Shenzhen Shokz Co., Ltd.
- Damping mesh24 Sep 2026US 2026/0286580 A1AAC Microtech (Changzhou) Co., Ltd.
Most cited
By later US patents
- Acoustic device295US 6,332,029 B1New Transducers Limited · 2001
- Mechanical vibrating element238US 4,421,381 AYokogawa Hokushin Electric Corporation · 1983
- 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