H04H 20/67
Common-wave systems, i.e. using separate transmitters operating on substantially the same frequency
H04H20/67 (Common-wave systems, i.e. using separate transmitters operating on substantially the same frequency) appears on 340 US grants and 186 published applications in this corpus.
Search patents in H04H- Granted patents
- 340
- Published applications
- 186
- Assignees
- 143
- Inventors
- 531
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 5 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 6 | 0 |
| 1991 | 11 | 0 |
| 1992 | 10 | 0 |
| 1993 | 16 | 0 |
| 1994 | 10 | 0 |
| 1995 | 9 | 0 |
| 1996 | 24 | 0 |
| 1997 | 18 | 0 |
| 1998 | 27 | 0 |
| 1999 | 13 | 0 |
| 2000 | 13 | 0 |
| 2001 | 9 | 1 |
| 2002 | 2 | 7 |
| 2003 | 1 | 2 |
| 2004 | 1 | 6 |
| 2005 | 3 | 2 |
| 2006 | 2 | 10 |
| 2007 | 4 | 11 |
| 2008 | 5 | 15 |
| 2009 | 7 | 17 |
| 2010 | 9 | 19 |
| 2011 | 17 | 21 |
| 2012 | 13 | 2 |
| 2013 | 14 | 12 |
| 2014 | 11 | 8 |
| 2015 | 14 | 8 |
| 2016 | 10 | 9 |
| 2017 | 4 | 3 |
| 2018 | 6 | 9 |
| 2019 | 8 | 5 |
| 2020 | 5 | 6 |
| 2021 | 6 | 4 |
| 2022 | 2 | 2 |
| 2023 | 5 | 2 |
| 2024 | 1 | 1 |
| 2025 | 1 | 4 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method and system for synchronizing audio transmission in a single frequency network15 Sep 2026US 12,737,122 B2iBiquity Digital Corporation
- Zone casting linked to smart devices with push notification functionality4 Feb 2025US 12,218,744 B2Lazer Adds, LLC.
- Transmitter and/or receiver for transmitting and/or receiving radio information signals27 Feb 2024US 11,916,655 B2Institut Fur Rundfunktechnik GmbH
- Power down workload estimation26 Dec 2023US 11,853,558 B2Micron Technology, Inc.
- Broadcast signal transmission apparatus using transmission identifier scaled with 4-bit injection level code and method using same25 Jul 2023US 11,711,156 B2Electronics and Telecommunications Research Institute
- Synchronized music on two-way smart radio devices for frontline workers11 Sep 2025US 2025/0284452 A1
- Music on a two-way smart radio device11 Sep 2025US 2025/0284453 A1
- Music on two-way smart radio devices11 Sep 2025US 2025/0286640 A1
- Method And System For Synchronizing Audio Transmission In A Single Frequency Network22 May 2025US 2025/0167906 A1iBiquity Digital Corporation
- System and method for providing broadcast transmitter specific pilots in synchronized broadcast networks21 Mar 2024US 2024/0097958 A1Saankhya Labs Pvt. Ltd.
Most cited
By later US patents
- Shared use video processing systems for distributing program signals from multiplexed digitized information signals405US 5,784,683 ABell Atlantic Network Services, Inc. · 1998
- Simulcasting digital video programs for broadcast and interactive services353US 5,729,549 ABell Atlantic Network Services, Inc. · 1998
- Simulcasting digital video programs for broadcast and interactive services337US 5,822,324 ABell Atlantic Network Services, Inc. · 1998
- Method of synchronizing the playback of a digital audio broadcast by inserting a control track pulse268US 7,209,795 B2Gateway, Inc. · 2007
- AIN interaction through wireless digital video network257US 5,751,707 ABell Atlantic Network Services, Inc. · 1998