H04H 20/47
Specially adapted for stereophonic broadcast systems
Official title: specially adapted for stereophonic broadcast systems
H04H20/47 (Specially adapted for stereophonic broadcast systems) appears on 298 US grants and 113 published applications in this corpus.
Search patents in H04H- Granted patents
- 298
- Published applications
- 113
- Assignees
- 108
- Inventors
- 345
- Latest grant
- 17 Jun 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 6 | 0 |
| 1979 | 7 | 0 |
| 1980 | 12 | 0 |
| 1981 | 7 | 0 |
| 1982 | 12 | 0 |
| 1983 | 25 | 0 |
| 1984 | 17 | 0 |
| 1985 | 12 | 0 |
| 1986 | 11 | 0 |
| 1987 | 18 | 0 |
| 1988 | 7 | 0 |
| 1989 | 8 | 0 |
| 1990 | 4 | 0 |
| 1991 | 6 | 0 |
| 1992 | 10 | 0 |
| 1993 | 3 | 0 |
| 1994 | 8 | 0 |
| 1995 | 4 | 0 |
| 1996 | 6 | 0 |
| 1997 | 4 | 0 |
| 1998 | 3 | 0 |
| 1999 | 4 | 0 |
| 2000 | 0 | 0 |
| 2001 | 4 | 3 |
| 2002 | 5 | 3 |
| 2003 | 3 | 16 |
| 2004 | 2 | 1 |
| 2005 | 4 | 4 |
| 2006 | 5 | 12 |
| 2007 | 4 | 26 |
| 2008 | 4 | 7 |
| 2009 | 6 | 7 |
| 2010 | 17 | 4 |
| 2011 | 14 | 6 |
| 2012 | 7 | 4 |
| 2013 | 2 | 2 |
| 2014 | 6 | 2 |
| 2015 | 1 | 2 |
| 2016 | 3 | 0 |
| 2017 | 1 | 2 |
| 2018 | 3 | 2 |
| 2019 | 2 | 3 |
| 2020 | 3 | 1 |
| 2021 | 2 | 2 |
| 2022 | 1 | 3 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for providing broadcast signal frequency and system for providing the same17 Jun 2025US 12,335,027 B2Hyundai Motor Company
- Method and apparatus for level control in blending an audio signal in an in-band on-channel radio system13 Sep 2022US RE49,210 E1iBiquity Digital Corporation
- FM system modes for HD radio15 Jun 2021US 11,038,622 B2iBiquity Digital Corporation
- Voice operated electronic device that blocks television commercials and substitutes alternate content therefor2 Mar 2021US 10,938,493 B2
- Voice operated electronic device that blocks radio commercials and substitutes alternate audio content17 Mar 2020US 10,594,418 B2
- Audio clock adjustment for multi-channel audio data output in network based public address30 Jul 2026US 2026/0222095 A1Inter. M Corporation
- Method for providing broadcast signal frequency and system for providing the same29 Dec 2022US 2022/0416923 A1Hyundai Motor Company
- System and method for transmitting at least one multichannel audio matrix across a global network3 Nov 2022US 2022/0353628 A1
- Information embedded method and system16 Jun 2022US 2022/0190944 A1Atlanta DTH, Inc.
- Method for Displaying Audio Content Currently Available From Other Sources on a Receiving Device29 Jul 2021US 2021/0234624 A1
Most cited
By later US patents
- Inductively coupled wireless system and method395US 6,424,820 B1Interval Research Corporation · 2002
- Apparatus and methods for identifying broadcast audio program selections in an FM stereo broadcast system339US 5,134,719 A1992
- System for short range transmission of a plurality of signals simultaneously over the air using high frequency carriers323US 5,491,839 AL. S. Research, Inc. · 1996
- Subband coded digital transmission system using some composite signals222US 5,606,618 AU. S. Philips Corporation · 1997
- Subband coded digital transmission system using some composite signals197US 5,539,829 AU. S. Philips Corporation · 1996