H04R 23/008
Transducers other than those covered by groups h04r9/00 - h04r21/00: using optical
Official title: {using optical signals for detecting or generating sound}
H04R23/008 (Transducers other than those covered by groups h04r9/00 - h04r21/00: using optical) appears on 380 US grants and 389 published applications in this corpus.
Search patents in H04R- Granted patents
- 380
- Published applications
- 389
- Assignees
- 211
- Inventors
- 712
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 5 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 4 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 6 | 0 |
| 2000 | 9 | 0 |
| 2001 | 3 | 2 |
| 2002 | 7 | 16 |
| 2003 | 4 | 13 |
| 2004 | 4 | 13 |
| 2005 | 5 | 13 |
| 2006 | 6 | 11 |
| 2007 | 8 | 11 |
| 2008 | 10 | 8 |
| 2009 | 11 | 5 |
| 2010 | 7 | 8 |
| 2011 | 8 | 10 |
| 2012 | 5 | 10 |
| 2013 | 9 | 11 |
| 2014 | 10 | 14 |
| 2015 | 14 | 13 |
| 2016 | 14 | 19 |
| 2017 | 21 | 20 |
| 2018 | 25 | 34 |
| 2019 | 20 | 25 |
| 2020 | 23 | 19 |
| 2021 | 18 | 17 |
| 2022 | 16 | 33 |
| 2023 | 17 | 23 |
| 2024 | 22 | 23 |
| 2025 | 16 | 10 |
| 2026 | 15 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Event recognition apparatus, event recognition method, and non-transitory computer-readable medium8 Sep 2026US 12,730,000 B2NEC Corporation
- Optical displacement sensor18 Aug 2026US 12,710,264 B2Sensibel AS
- Acoustic feature computing apparatus, acoustic feature computing method, and program23 Jun 2026US 12,666,206 B2NTT, Inc.
- Microphone component and method of manufacture16 Jun 2026US 12,659,642 B2Sensibel AS
- Sound detection device2 Jun 2026US 12,647,724 B2Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
- Silent Speech and Ear-Mountable Devices10 Sep 2026US 2026/0268920 A1
- Acoustic feature computing apparatus, acoustic feature computing method, and program30 Jul 2026US 2026/0219100 A1NTT, Inc.
- Real ear sound pressure level measurement for a hearing device25 Jun 2026US 2026/0177442 A1Starkey Laboratories, Inc.
- Audiovisual speech recognition using visual speech information21 May 2026US 2026/0141912 A1
- Optical path length sensor7 May 2026US 2026/0126283 A1Lumiary AB
Most cited
By later US patents
- Microphone having linear optical transducers221US 6,154,551 A2000
- Apparatus and methods for determining the relative displacement of an object193US 5,619,583 ATexas Instruments Incorporated · 1997
- Methods and systems for capturing the condition of a physical structure168US 8,872,818 B2State Farm Mutual Automobile Insurance Company · 2014
- Opto-acoustic transducer and telephone receiver131US 4,334,321 A1982
- Photoacoustic speaker and method130US 4,641,377 AInstitute of Gas Technology · 1987