H04H 20/34
Using an out-of-band subcarrier signal
Official title: using an out-of-band subcarrier signal
H04H20/34 (Using an out-of-band subcarrier signal) appears on 181 US grants and 100 published applications in this corpus.
Search patents in H04H- Granted patents
- 181
- Published applications
- 100
- Assignees
- 92
- Inventors
- 281
- Latest grant
- 2 Jul 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 4 | 0 |
| 1992 | 8 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 9 | 0 |
| 1996 | 16 | 0 |
| 1997 | 9 | 0 |
| 1998 | 14 | 0 |
| 1999 | 9 | 0 |
| 2000 | 5 | 0 |
| 2001 | 1 | 0 |
| 2002 | 5 | 5 |
| 2003 | 3 | 5 |
| 2004 | 1 | 8 |
| 2005 | 4 | 14 |
| 2006 | 3 | 12 |
| 2007 | 8 | 9 |
| 2008 | 9 | 7 |
| 2009 | 6 | 13 |
| 2010 | 6 | 4 |
| 2011 | 6 | 4 |
| 2012 | 7 | 1 |
| 2013 | 4 | 4 |
| 2014 | 7 | 2 |
| 2015 | 5 | 5 |
| 2016 | 2 | 2 |
| 2017 | 2 | 0 |
| 2018 | 2 | 1 |
| 2019 | 2 | 1 |
| 2020 | 0 | 1 |
| 2021 | 2 | 0 |
| 2022 | 1 | 0 |
| 2023 | 0 | 1 |
| 2024 | 1 | 0 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Out of band frequency conversion using demodulation2 Jul 2024US 12,028,202 B2ARRIS Enterprises LLC
- Broadcast response system1 Mar 2022US 11,265,095 B2Stratosaudio, Inc.
- Enhanced radio systems and methods31 Aug 2021US 11,108,482 B23D Radio LLC
- Enhanced radio systems and methods27 Jul 2021US 11,075,706 B23D Radio LLC
- Broadcast response system3 Dec 2019US 10,498,472 B2Stratosaudio, Inc.
- System and methods to capture and stream multiple radio channels3 Jul 2025US 2025/0219750 A1
- Out of band frequency conversion using demodulation4 May 2023US 2023/0140220 A1ARRIS Enterprises LLC
- Broadcast response system7 May 2020US 2020/0145118 A1Stratosaudio, Inc.
- Broadcast response system27 Jun 2019US 2019/0199461 A1Stratosaudio, Inc.
- Broadcast response system6 Dec 2018US 2018/0351673 A1Stratosaudio, Inc.
Most cited
By later US patents
- Arrangement for and method of processing data, especially for identifying and verifying airing of television broadcast programs497US 5,200,822 ANational Broadcasting Company, Inc. · 1993
- Apparatus and methods for accessing information relating to radio and television programs493US 5,703,795 A1997
- Apparatus and methods for identifying broadcast audio program selections in an FM stereo broadcast system339US 5,134,719 A1992
- Broadcast system with associated data capabilities273US 5,579,537 ADigital D.J. Inc. · 1996
- Televison programming information system260US 4,449,249 A1984