H04J 3/0647
Synchronisation among tdm nodes
Official title: {Synchronisation among TDM nodes}
H04J3/0647 (Synchronisation among tdm nodes) appears on 312 US grants and 274 published applications in this corpus.
Search patents in H04J- Granted patents
- 312
- Published applications
- 274
- Assignees
- 161
- Inventors
- 640
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 5 | 0 |
| 1998 | 5 | 0 |
| 1999 | 4 | 0 |
| 2000 | 8 | 0 |
| 2001 | 5 | 0 |
| 2002 | 3 | 2 |
| 2003 | 6 | 7 |
| 2004 | 6 | 4 |
| 2005 | 3 | 9 |
| 2006 | 8 | 5 |
| 2007 | 4 | 3 |
| 2008 | 2 | 8 |
| 2009 | 4 | 9 |
| 2010 | 4 | 11 |
| 2011 | 5 | 6 |
| 2012 | 7 | 11 |
| 2013 | 11 | 18 |
| 2014 | 16 | 12 |
| 2015 | 14 | 16 |
| 2016 | 16 | 16 |
| 2017 | 22 | 14 |
| 2018 | 18 | 11 |
| 2019 | 11 | 13 |
| 2020 | 14 | 20 |
| 2021 | 15 | 19 |
| 2022 | 23 | 18 |
| 2023 | 18 | 18 |
| 2024 | 14 | 11 |
| 2025 | 17 | 9 |
| 2026 | 4 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Systems and methods for watermarking time, place and identity of events8 Sep 2026US 12,732,293 B2Hoptroff London Limited
- Downlink power control for interference mitigation in competing communication systems11 Aug 2026US 12,706,693 B1Cable Television Laboratories, Inc.
- Priority-based designated interface selection in a link aggregation group4 Aug 2026US 12,700,936 B2Hewlett Packard Enterprise Development LP
- Communication system, master device, slave device, and control method for communication system7 Apr 2026US 12,598,056 B2Panasonic Intellectual Property Management Co., Ltd.
- Time synchronization method, device and apparatus, and storage medium23 Dec 2025US 12,506,554 B2Sanechips Technology Co., Ltd.
- Audio communications system23 Jul 2026US 2026/0211611 A1Cirrus Logic International Semiconductor Ltd.
- Clock Synchronization At Scale In Data Centers23 Jul 2026US 2026/0213864 A1Google Inc.
- Systems and methods for synchronizing network nodes26 Mar 2026US 2026/0088968 A1Cisco Technology, Inc.
- Messaging Channel in a Coherent Optical DSP Frame15 Jan 2026US 2026/0019149 A1Ciena Corporation
- Transmitting clock signals in network packets18 Dec 2025US 2025/0385744 A1Amazon Technologies, Inc.
Most cited
By later US patents
- Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels352US 4,675,863 AInternational Mobile Machines Corporation · 1987
- Coexisting communication systems325US 5,732,076 AOmnipoint Corporation · 1998
- Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels257US 5,022,024 AInternational Mobile Machines Corporation · 1991
- Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels241US 4,912,705 AInternational Mobile Machines Corporation · 1990
- Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels236US 4,817,089 AInternational Mobile Machines Corporation · 1989