H04R 13/00
Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
H04R13/00 (Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet) appears on 103 US grants and 99 published applications in this corpus.
Search patents in H04R- Granted patents
- 103
- Published applications
- 99
- Assignees
- 79
- Inventors
- 194
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 6 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 4 |
| 2002 | 1 | 7 |
| 2003 | 5 | 4 |
| 2004 | 2 | 2 |
| 2005 | 2 | 1 |
| 2006 | 2 | 1 |
| 2007 | 2 | 1 |
| 2008 | 0 | 4 |
| 2009 | 2 | 1 |
| 2010 | 0 | 1 |
| 2011 | 1 | 3 |
| 2012 | 2 | 2 |
| 2013 | 2 | 4 |
| 2014 | 2 | 2 |
| 2015 | 4 | 3 |
| 2016 | 6 | 5 |
| 2017 | 7 | 2 |
| 2018 | 3 | 2 |
| 2019 | 2 | 5 |
| 2020 | 2 | 10 |
| 2021 | 7 | 4 |
| 2022 | 4 | 9 |
| 2023 | 4 | 7 |
| 2024 | 7 | 7 |
| 2025 | 8 | 0 |
| 2026 | 3 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Electronic device and speaker device2 Jun 2026US 12,647,732 B2Innolux Corporation
- Audio device28 Apr 2026US 12,615,462 B1Guangzhou Colorful Stage Equipment Co., Ltd
- Ultrasonic sensor17 Feb 2026US 12,555,557 B2Denso Corporation
- Ultrasonic sensor21 Oct 2025US 12,449,523 B2Denso Corporation
- MEMS device including coil structure with corrugated polymer film14 Oct 2025US 12,441,606 B2United Microelectronics Corp.
- Sound production unit and audio device23 Jul 2026US 2026/0214390 A1Caldron Technologies Pte. Ltd.
- Planar-dynamic acoustic transducer9 Jul 2026US 2026/0197591 A1
- Eyeglasses2 Jul 2026US 2026/0189830 A1Shenzhen Shokz Co., Ltd.
- Diaphragm and audio device18 Jun 2026US 2026/0172755 A1Caldron Technologies Pte. Ltd.
- Micro speaker structure and method for forming the same21 May 2026US 2026/0143295 A1Fortemedia, Inc.
Most cited
By later US patents
- Integrated vibrating and sound producing device56US 5,528,697 ANamiki Precision Jewel Co., Ltd. · 1996
- Enhanced efficiency planar transducers40US 5,901,235 AEminent Technology Incorporated · 1999
- Bone-conduction speaker28US 6,141,427 ATemco Japan Co., Ltd. · 2000
- Composition, processing and devices including magnetic alloy25US 4,075,437 ABell Telephone Laboratories, Incorporated · 1978
- Planar magnetic acoustical transducer stamped pole structures24US 6,185,310 B2Eminent Technology Incorporated · 2001