H04R 1/22
For obtaining desired frequency characteristic only
Official title: for obtaining desired frequency characteristic only {(circuit for combining transducers having different responses H04R3/00; for hearing aids H04R25/407)}
H04R1/22 (For obtaining desired frequency characteristic only) appears on 6,372 US grants and 6,853 published applications in this corpus.
Search patents in H04R- Granted patents
- 6,372
- Published applications
- 6,853
- Assignees
- 1,686
- Inventors
- 9,608
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 18 | 0 |
| 1977 | 26 | 0 |
| 1978 | 22 | 0 |
| 1979 | 39 | 0 |
| 1980 | 34 | 0 |
| 1981 | 28 | 0 |
| 1982 | 33 | 0 |
| 1983 | 29 | 0 |
| 1984 | 32 | 0 |
| 1985 | 28 | 0 |
| 1986 | 28 | 0 |
| 1987 | 21 | 0 |
| 1988 | 24 | 0 |
| 1989 | 39 | 0 |
| 1990 | 36 | 0 |
| 1991 | 33 | 0 |
| 1992 | 40 | 0 |
| 1993 | 29 | 0 |
| 1994 | 37 | 0 |
| 1995 | 17 | 0 |
| 1996 | 24 | 0 |
| 1997 | 17 | 0 |
| 1998 | 36 | 0 |
| 1999 | 36 | 0 |
| 2000 | 36 | 0 |
| 2001 | 45 | 19 |
| 2002 | 45 | 49 |
| 2003 | 49 | 38 |
| 2004 | 44 | 72 |
| 2005 | 28 | 95 |
| 2006 | 46 | 101 |
| 2007 | 45 | 106 |
| 2008 | 44 | 103 |
| 2009 | 50 | 129 |
| 2010 | 54 | 118 |
| 2011 | 81 | 117 |
| 2012 | 166 | 189 |
| 2013 | 155 | 201 |
| 2014 | 182 | 238 |
| 2015 | 244 | 287 |
| 2016 | 263 | 318 |
| 2017 | 318 | 401 |
| 2018 | 365 | 450 |
| 2019 | 512 | 460 |
| 2020 | 448 | 490 |
| 2021 | 407 | 461 |
| 2022 | 413 | 467 |
| 2023 | 396 | 557 |
| 2024 | 459 | 578 |
| 2025 | 480 | 440 |
| 2026 | 291 | 369 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H04R 1/28Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances4,221
- H04R 1/24Structural combinations of separate transducers or of two parts of the same1,121
- H04R 1/26Spatial arrangements of separate transducers responsive to two or more frequency ranges1,040
- H04R 1/30Combinations of transducers with horns498
- H04R 1/222For microphones322
- H04R 1/227Using transducers reproducing the same frequency band240
- H04R 1/225For telephonic receivers120
Recent patents
- User identification with audio earbuds6 Oct 2026US 12,755,745 B2Intel Corporation
- TWS including planar speaker incorporating circuit-embedded vibrator, dynamic speaker, and microphone6 Oct 2026US 12,756,969 B2
- System and method for generating an audio signal6 Oct 2026US 12,756,970 B2Sonicedge Ltd.
- Electronic device6 Oct 2026US 12,756,971 B2Lenovo (Beijing) Limited
- Apparatus and display apparatus with enhanced vibration29 Sep 2026US 12,746,575 B2LG Display Co., Ltd.
- Method of Assembling An Elliptical Transducer8 Oct 2026US 2026/0311669 A1QorTek, Inc.
- Elliptical Transducers8 Oct 2026US 2026/0311670 A1QorTek, Inc.
- Loudspeaker drive unit8 Oct 2026US 2026/0313287 A1Genelec Oy
- Full-bandwidth dual-sided speaker device8 Oct 2026US 2026/0313288 A1Merry Electronics (Suzhou) Co., Ltd.
- Micro-speaker device8 Oct 2026US 2026/0313289 A1Infineon Technologies AG
Most cited
By later US patents
- Orientation-responsive acoustic driver selection405US 8,934,647 B2Bose Corporation · 2015
- Ad hoc sensor arrays376US 8,175,297 B1Google Inc. · 2012
- Piezoelectric bone conductive in ear voice sounds transmitting and receiving apparatus368US 4,150,262 A1979
- Acoustic systems for electronic devices333US 8,055,003 B2Apple Inc. · 2011
- Electroacoustical transducing with low frequency augmenting devices304US 8,238,578 B2Bose Corporation · 2012