H04H 20/88
Stereophonic broadcast systems
Official title: Stereophonic broadcast systems {(multiplex system in general H04J)}
H04H20/88 (Stereophonic broadcast systems) appears on 313 US grants and 200 published applications in this corpus.
Search patents in H04H- Granted patents
- 313
- Published applications
- 200
- Assignees
- 148
- Inventors
- 455
- Latest grant
- 7 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 22 | 0 |
| 1977 | 11 | 0 |
| 1978 | 4 | 0 |
| 1979 | 3 | 0 |
| 1980 | 5 | 0 |
| 1981 | 7 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 8 | 0 |
| 1994 | 7 | 0 |
| 1995 | 4 | 0 |
| 1996 | 7 | 0 |
| 1997 | 13 | 0 |
| 1998 | 10 | 0 |
| 1999 | 10 | 0 |
| 2000 | 5 | 0 |
| 2001 | 10 | 5 |
| 2002 | 9 | 12 |
| 2003 | 7 | 9 |
| 2004 | 3 | 10 |
| 2005 | 7 | 9 |
| 2006 | 3 | 9 |
| 2007 | 10 | 30 |
| 2008 | 7 | 16 |
| 2009 | 3 | 10 |
| 2010 | 16 | 4 |
| 2011 | 16 | 11 |
| 2012 | 15 | 10 |
| 2013 | 5 | 9 |
| 2014 | 8 | 11 |
| 2015 | 8 | 9 |
| 2016 | 16 | 10 |
| 2017 | 9 | 2 |
| 2018 | 5 | 2 |
| 2019 | 5 | 5 |
| 2020 | 3 | 3 |
| 2021 | 1 | 0 |
| 2022 | 3 | 3 |
| 2023 | 3 | 3 |
| 2024 | 0 | 4 |
| 2025 | 3 | 3 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
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.
- Streaming audio synchronization system20 May 2025US 12,308,945 B2White Snake Projects, Inc.
- Method and apparatus for compressing and decompressing a higher order ambisonics signal representation4 Mar 2025US 12,245,012 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 for transmitting audio data by using short-range wireless communication in wireless communication system, and apparatus for same15 Aug 2024US 2024/0276354 A1LG Electronics Inc.
Most cited
By later US patents
- Wireless surround sound speaker system371US 6,487,296 B12002
- Analog spread spectrum wireless speaker system317US 5,673,323 AL. S. Research, Inc. · 1997
- Method of transmitting or storing masked sub-band coded audio signals307US 4,972,484 ABayerische Rundfunkwerbung GmbH · 1990
- Method and apparatus for coding audio signals based on perceptual model276US 5,285,498 AAT&T Bell Laboratories · 1994
- Wireless stereo headphone241US 4,845,751 A1989