H04H 20/31
Using in-band signals
Official title: using in-band signals, e.g. subsonic or cue signal
H04H20/31 (Using in-band signals) appears on 358 US grants and 307 published applications in this corpus.
Search patents in H04H- Granted patents
- 358
- Published applications
- 307
- Assignees
- 153
- Inventors
- 579
- Latest grant
- 9 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 8 | 0 |
| 1995 | 5 | 0 |
| 1996 | 10 | 0 |
| 1997 | 5 | 0 |
| 1998 | 19 | 0 |
| 1999 | 11 | 0 |
| 2000 | 4 | 0 |
| 2001 | 5 | 7 |
| 2002 | 12 | 18 |
| 2003 | 12 | 25 |
| 2004 | 11 | 26 |
| 2005 | 13 | 16 |
| 2006 | 12 | 18 |
| 2007 | 14 | 18 |
| 2008 | 16 | 11 |
| 2009 | 18 | 21 |
| 2010 | 16 | 26 |
| 2011 | 15 | 13 |
| 2012 | 19 | 14 |
| 2013 | 13 | 6 |
| 2014 | 15 | 10 |
| 2015 | 14 | 14 |
| 2016 | 8 | 7 |
| 2017 | 9 | 8 |
| 2018 | 7 | 8 |
| 2019 | 9 | 8 |
| 2020 | 10 | 8 |
| 2021 | 4 | 6 |
| 2022 | 7 | 6 |
| 2023 | 7 | 4 |
| 2024 | 4 | 5 |
| 2025 | 7 | 3 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Broadcasting contextual information through modification of audio and video interfaces9 Dec 2025US 12,494,857 B2JVCKENWOOD Corporation
- Apparatus and methods to associate different watermarks detected in media4 Nov 2025US 12,464,200 B2The Nielsen Company (US), LLC
- Methods and apparatus to perform audio watermarking and watermark detection and extraction7 Oct 2025US 12,437,769 B2The Nielsen Company (US), LLC
- Broadcast receiving apparatus and method of processing transmission waves8 Jul 2025US 12,355,548 B2Maxell, Ltd.
- Zone casting linked to smart devices with push notification functionality4 Feb 2025US 12,218,744 B2Lazer Adds, LLC.
- Inaudible orthogonal signal communication2 Apr 2026US 2026/0095258 A1Amazon Technologies, Inc.
- Broadcast receiving apparatus and method of processing transmission waves2 Oct 2025US 2025/0310017 A1Maxell, Ltd.
- Methods and apparatus to perform audio watermarking and watermark detection and extraction21 Aug 2025US 2025/0265293 A1The Nielsen Company (US), LLC
- Methods, systems, and apparatuses for presence detection17 Apr 2025US 2025/0126439 A1Comcast Cable Communications, LLC
- Apparatus and methods to associate different watermarks detected in media31 Oct 2024US 2024/0364979 A1The Nielsen Company (US), LLC
Most cited
By later US patents
- Audience measurement system utilizing ancillary codes and passive signatures1,063US 5,481,294 AA. C. Nielsen Company · 1996
- Watermark embedder and reader942US 6,614,914 B1Digimarc Corporation · 2003
- Connected audio and other media objects859US 6,505,160 B1Digimarc Corporation · 2003
- System and method for playing games and rewarding successful players816US 5,697,844 AResponse Reward Systems L.C. · 1997
- Central and remote evaluation of responses of participatory broadcast audience with automatic crediting and couponing763US 5,759,101 AResponse Reward Systems L.C. · 1998