H04R 1/227
Using transducers reproducing the same frequency band
Official title: {using transducers reproducing the same frequency band}
H04R1/227 (Using transducers reproducing the same frequency band) appears on 240 US grants and 247 published applications in this corpus.
Search patents in H04R- Granted patents
- 240
- Published applications
- 247
- Assignees
- 141
- Inventors
- 526
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 4 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 4 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 4 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 5 | 0 |
| 1993 | 3 | 0 |
| 1994 | 5 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 5 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 2 |
| 2002 | 2 | 2 |
| 2003 | 1 | 1 |
| 2004 | 1 | 3 |
| 2005 | 1 | 6 |
| 2006 | 6 | 8 |
| 2007 | 3 | 5 |
| 2008 | 3 | 7 |
| 2009 | 1 | 10 |
| 2010 | 1 | 9 |
| 2011 | 9 | 3 |
| 2012 | 10 | 11 |
| 2013 | 9 | 13 |
| 2014 | 12 | 13 |
| 2015 | 6 | 5 |
| 2016 | 7 | 7 |
| 2017 | 3 | 14 |
| 2018 | 9 | 13 |
| 2019 | 13 | 7 |
| 2020 | 15 | 13 |
| 2021 | 16 | 10 |
| 2022 | 5 | 17 |
| 2023 | 13 | 20 |
| 2024 | 16 | 17 |
| 2025 | 13 | 13 |
| 2026 | 6 | 18 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Acoustic signal output device18 Aug 2026US 12,713,168 B2NTT, Inc.
- Sound-producing apparatus, calibration method for sound-producing apparatus, sound-producing unit and headset equipment4 Aug 2026US 12,701,352 B2Goertek Inc.
- Acoustic output device2 Jun 2026US 12,647,723 B2Shenzhen Shokz Co., Ltd.
- Sound transducer unit2 Jun 2026US 12,647,731 B2USound GmbH
- Loudspeaker, signal processor, method for manufacturing the loudspeaker, or method for operating the signal processor by using dual-mode signal generation with two sound generators17 Feb 2026US 12,556,863 B2Kaetel Systems GmbH
- Method and apparatus for calibrating sound quality of earphone, and device and storage medium27 Aug 2026US 2026/0255104 A1Goertek Technology Co., Ltd.
- Speaker system and electronic device13 Aug 2026US 2026/0238917 A1AAC Microtech (Changzhou) Co., Ltd.
- Loudspeaker, loudspeaker systems and method23 Jul 2026US 2026/0214389 A1Pss Belgium NV
- Loudspeaker including dual speaker drivers with conjoined pair of acoustic transmission lines, and vehicle structure having the loudspeaker therein2 Jul 2026US 2026/0189847 A1Harman International Industries, Incorporated
- Acoustic signal output device25 Jun 2026US 2026/0181315 A1NTT, Inc.
Most cited
By later US patents
- Electroacoustical transducing with at least three cascaded subchambers84US 5,092,424 ABose Corporation · 1992
- Apparatus for outputting sound comprising multiple receivers and a common output channel78US 8,509,468 B2Sonion Nederland B. V. · 2013
- Acoustic system76US 5,821,471 A1998
- Loudspeaker having enhanced response at bass frequencies72US 4,756,382 A1988
- Piezoelectric oscillation assembly including several individual piezoelectric oscillation devices having a common oscillation plate member68US 4,751,419 ANitto, Inc. · 1988