H04R 19/01
Electrostatic transducers: characterised by the use of electrets
Official title: characterised by the use of electrets
H04R19/01 (Electrostatic transducers: characterised by the use of electrets) appears on 595 US grants and 578 published applications in this corpus.
Search patents in H04R- Granted patents
- 595
- Published applications
- 578
- Assignees
- 259
- Inventors
- 1,032
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 5 | 0 |
| 1978 | 3 | 0 |
| 1979 | 4 | 0 |
| 1980 | 2 | 0 |
| 1981 | 7 | 0 |
| 1982 | 3 | 0 |
| 1983 | 6 | 0 |
| 1984 | 9 | 0 |
| 1985 | 6 | 0 |
| 1986 | 7 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 4 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 4 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 4 | 0 |
| 2000 | 3 | 0 |
| 2001 | 5 | 5 |
| 2002 | 5 | 14 |
| 2003 | 8 | 18 |
| 2004 | 10 | 9 |
| 2005 | 12 | 22 |
| 2006 | 13 | 23 |
| 2007 | 21 | 37 |
| 2008 | 11 | 27 |
| 2009 | 12 | 44 |
| 2010 | 18 | 39 |
| 2011 | 26 | 33 |
| 2012 | 43 | 30 |
| 2013 | 32 | 24 |
| 2014 | 41 | 25 |
| 2015 | 33 | 24 |
| 2016 | 32 | 31 |
| 2017 | 31 | 29 |
| 2018 | 21 | 31 |
| 2019 | 32 | 22 |
| 2020 | 21 | 21 |
| 2021 | 18 | 20 |
| 2022 | 13 | 11 |
| 2023 | 19 | 20 |
| 2024 | 9 | 6 |
| 2025 | 9 | 6 |
| 2026 | 7 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Electret microphone4 Aug 2026US 12,701,367 B2Sennheiser electronic GmbH & Co. KG
- Electret microphone5 May 2026US 12,621,611 B2Sennheiser electronic GmbH & Co. KG
- Speaker device21 Apr 2026US 12,610,179 B2Aac Kaitai Technologies (Wuhan) Co., Ltd
- Electro-acoustic transducer31 Mar 2026US 12,593,175 B2Kabushiki Kaisha Audio-Technica
- Substituted thiolate salt melt additives17 Feb 2026US 12,552,914 B23M Innovative Properties Company
- Display device, display module and sound producing device20 Aug 2026US 2026/0247070 A1Boe Technology Group Co., Ltd.
- Microphone tuning method13 Aug 2026US 2026/0238943 A1Harman Becker Gepkocsirendszer Gyarto Kft.
- Audio systems, devices, and methods16 Jul 2026US 2026/0205730 A1
- Simultaneous dual use of an acoustic device as a loudspeaker and microphone25 Jun 2026US 2026/0181334 A1Waves Audio Ltd.
- Electret capacitor sensor and manufacturing method for the same18 Jun 2026US 2026/0172757 A1National University Corporation Saitama University
Most cited
By later US patents
- Ear microphone340US 4,588,867 A1986
- Miniature silicon condenser microphone190US 7,166,910 B2Knowles Electronics, LLC · 2007
- Microphone with improved sound inlet port181US 7,072,482 B2Sonion Nederland B. V. · 2006
- Hearing apparatus163US 5,390,254 A1995
- Implantable microphone for cochlear implants and the like143US 5,782,744 A1998