H04R 25/353
Frequency
Official title: {Frequency, e.g. frequency shift or compression}
H04R25/353 (Frequency) appears on 303 US grants and 340 published applications in this corpus.
Search patents in H04R- Granted patents
- 303
- Published applications
- 340
- Assignees
- 128
- Inventors
- 474
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 3 | 0 |
| 2002 | 1 | 2 |
| 2003 | 1 | 2 |
| 2004 | 1 | 3 |
| 2005 | 2 | 3 |
| 2006 | 0 | 6 |
| 2007 | 2 | 4 |
| 2008 | 1 | 9 |
| 2009 | 2 | 9 |
| 2010 | 4 | 10 |
| 2011 | 3 | 11 |
| 2012 | 11 | 16 |
| 2013 | 17 | 14 |
| 2014 | 12 | 21 |
| 2015 | 24 | 22 |
| 2016 | 19 | 25 |
| 2017 | 19 | 33 |
| 2018 | 29 | 21 |
| 2019 | 30 | 19 |
| 2020 | 24 | 19 |
| 2021 | 12 | 13 |
| 2022 | 13 | 24 |
| 2023 | 21 | 18 |
| 2024 | 20 | 14 |
| 2025 | 7 | 11 |
| 2026 | 4 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method of an electronic device for filtering interference23 Jun 2026US 12,666,209 B2WS Audiology A/S
- Cochlear implant system and method19 May 2026US 12,634,644 B2International Business Machines Corporation
- Haptic system and method24 Mar 2026US 12,585,332 B2Sony Interactive Entertainment Inc.
- Environmental noise estimation and reduction based on a constructed noise reference from a multi-microphone input10 Mar 2026US 12,574,687 B2Earlens Corporation
- Methods and systems for configuring bone conduction hearing aids21 Oct 2025US 12,452,612 B2Shenzhen Shokz Co., Ltd.
- Hearing aid and method for use of same17 Sep 2026US 2026/0281628 A1
- Switching a Hearing Device Between Two Sets of Actuator Strengths20 Aug 2026US 2026/0247084 A1Sonova AG
- Apparatus, methods, and computer programs for audio processing23 Jul 2026US 2026/0214383 A1Nokia Technologies Oy
- Hearing aid comprising an input unit associated with different sampling rates for aliasing artefact suppression in common frequency components11 Jun 2026US 2026/0164190 A1Oticon A/S
- Haptic system and method4 Jun 2026US 2026/0153932 A1Sony Interactive Entertainment Inc.
Most cited
By later US patents
- Apparatus and methods for combining audio compression and feedback cancellation in a hearing aid172US 6,434,246 B1GN ReSound AS · 2002
- Supersonic bone conduction hearing aid and method137US 4,982,434 ACenter for Innovative Technology · 1991
- Method for the electrical stimulation of the auditory nerve and multichannel hearing prosthesis for carrying out the method133US 4,428,377 ASiemens Aktiengesellschaft · 1984
- Generalized signal processing hearing aid116US 4,366,349 A1982
- Apparatus and methods for proportional audio compression and frequency shifting109US 6,577,739 B1University of Iowa Research Foundation · 2003