H04R 23/002
Transducers other than those covered by groups h04r9/00 - h04r21/00: using electrothermic-effect
Official title: {using electrothermic-effect transducer}
H04R23/002 (Transducers other than those covered by groups h04r9/00 - h04r21/00: using electrothermic-effect) appears on 137 US grants and 145 published applications in this corpus.
Search patents in H04R- Granted patents
- 137
- Published applications
- 145
- Assignees
- 60
- Inventors
- 152
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 1 | 15 |
| 2010 | 0 | 25 |
| 2011 | 14 | 15 |
| 2012 | 25 | 13 |
| 2013 | 11 | 4 |
| 2014 | 20 | 15 |
| 2015 | 4 | 7 |
| 2016 | 9 | 8 |
| 2017 | 14 | 5 |
| 2018 | 5 | 3 |
| 2019 | 6 | 3 |
| 2020 | 8 | 7 |
| 2021 | 1 | 3 |
| 2022 | 3 | 4 |
| 2023 | 4 | 5 |
| 2024 | 2 | 6 |
| 2025 | 1 | 1 |
| 2026 | 6 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Pressure wave generating element8 Sep 2026US 12,732,758 B2Murata Manufacturing Co., Ltd.
- Pressure wave generating element and method for producing the same26 May 2026US 12,641,376 B2Murata Manufacturing Co., Ltd.
- Pressure wave generating element and method for producing the same21 Apr 2026US 12,610,199 B2Murata Manufacturing Co., Ltd.
- Safety apparatus10 Feb 2026US 12,546,374 B2Nokia Technologies Oy
- Systems, apparatus, and methods for algae control system using a carbon nanotube sonic generator20 Jan 2026US 12,528,720 B2
- Strain-insensitive stretchable thermoacoustic loudspeaker and method for manufacturing the same20 Aug 2026US 2026/0247081 A1UIF (University Industry Foundation), Yonsei University
- Thermoacoustic System23 Jul 2026US 2026/0210915 A1Qinetiq Limited
- Systems, apparatus, and methods for algae control system using a carbon nanotube sonic generator21 May 2026US 2026/0138896 A1
- Method and apparatus for maintaining films with free-standing region21 Aug 2025US 2025/0263293 A1Canatu Finland Oy
- Graphene transducer7 Nov 2024US 2024/0373169 A1Paragraf Limited
Most cited
By later US patents
- Pressure wave generator and process for manufacturing the same36US 7,474,590 B2Panasonic Electric Works Co., Ltd. · 2009
- Thermoacoustic device31US 8,068,626 B2Beijing FUNATE Innovation Technology Co., Ltd. · 2011
- Headphone26US 8,208,661 B2Hon Hai Precision Industry Co., Ltd. · 2012
- Thermoacoustic device15US 8,073,164 B2Beijing FUNATE Innovation Technology Co., Ltd. · 2011
- Optically clear diaphragm for an acoustic transducer and method for making same15US 8,189,851 B2Emo Labs, Inc. · 2012