H04H 20/89
Using three or more audio channels
Official title: using three or more audio channels, e.g. triphonic or quadraphonic
H04H20/89 (Using three or more audio channels) appears on 147 US grants and 112 published applications in this corpus.
Search patents in H04H- Granted patents
- 147
- Published applications
- 112
- Assignees
- 67
- Inventors
- 197
- Latest grant
- 7 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 18 | 0 |
| 1977 | 8 | 0 |
| 1978 | 4 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 4 | 1 |
| 2002 | 3 | 7 |
| 2003 | 1 | 3 |
| 2004 | 0 | 3 |
| 2005 | 3 | 5 |
| 2006 | 2 | 5 |
| 2007 | 4 | 27 |
| 2008 | 4 | 5 |
| 2009 | 0 | 9 |
| 2010 | 16 | 3 |
| 2011 | 12 | 4 |
| 2012 | 11 | 5 |
| 2013 | 4 | 3 |
| 2014 | 3 | 4 |
| 2015 | 3 | 4 |
| 2016 | 9 | 7 |
| 2017 | 5 | 0 |
| 2018 | 2 | 1 |
| 2019 | 2 | 3 |
| 2020 | 1 | 2 |
| 2021 | 1 | 0 |
| 2022 | 2 | 3 |
| 2023 | 2 | 2 |
| 2024 | 0 | 2 |
| 2025 | 2 | 3 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Robust broadcast via relayed retransmission7 Apr 2026US 12,598,013 B2Bose Corporation
- Wireless multi-channel audio transmission method and device27 Jan 2026US 12,538,075 B2Zgmicro Hefei Co., Ltd.
- Multi-lobe digital microphone enabled audio capture and spatialization for generating an immersive arena based audio experience15 Jul 2025US 12,363,357 B2Shure Acquisition Holdings, Inc.
- Method and apparatus for compressing and decompressing a higher order ambisonics signal representation4 Mar 2025US 12,245,012 B2Dolby Laboratories Licensing Corporation
- Method and apparatus for compressing and decompressing a higher order Ambisonics signal representation17 Oct 2023US 11,792,591 B2Dolby Laboratories Licensing Corporation
- Robust broadcast via relayed retransmission16 Jul 2026US 2026/0205218 A1Bose Corporation
- Multi-lobe digital microphone enabled audio capture and spatialization for generating an immersive arena based audio experience11 Dec 2025US 2025/0380011 A1Shure Acquisition Holdings, Inc.
- Method and apparatus for compressing and decompressing a higher order ambisonics signal representation14 Aug 2025US 2025/0260934 A1Dolby Laboratories Licensing Corporation
- Audio signal distribution for the thermal optimisation of speakers8 May 2025US 2025/0150188 A1Sagemcom Broadband SAS
- Method and apparatus for compressing and decompressing a higher order ambisonics signal representation2 May 2024US 2024/0147173 A1Dolby Laboratories Licensing Corporation
Most cited
By later US patents
- Wireless surround sound speaker system371US 6,487,296 B12002
- Subband coded digital transmission system using some composite signals222US 5,606,618 AU. S. Philips Corporation · 1997
- Use of voice-to-remaining audio (VRA) in consumer applications202US 6,311,155 B1Hearing Enhancement Company, LLC · 2001
- Digital sub-band transmission system with transmission of an additional signal191US 5,530,655 AU. S. Philips Corporation · 1996
- Frequency division multiplex system using comb filters153US 3,991,277 A1976