H04J 3/0688
Change of the master or reference
Official title: {Change of the master or reference, e.g. take-over or failure of the master}
H04J3/0688 (Change of the master or reference) appears on 464 US grants and 263 published applications in this corpus.
Search patents in H04J- Granted patents
- 464
- Published applications
- 263
- Assignees
- 209
- Inventors
- 898
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 4 | 0 |
| 1986 | 3 | 0 |
| 1987 | 4 | 0 |
| 1988 | 0 | 0 |
| 1989 | 6 | 0 |
| 1990 | 6 | 0 |
| 1991 | 9 | 0 |
| 1992 | 4 | 0 |
| 1993 | 3 | 0 |
| 1994 | 6 | 0 |
| 1995 | 6 | 0 |
| 1996 | 10 | 0 |
| 1997 | 18 | 0 |
| 1998 | 10 | 0 |
| 1999 | 18 | 0 |
| 2000 | 18 | 0 |
| 2001 | 22 | 5 |
| 2002 | 15 | 19 |
| 2003 | 26 | 9 |
| 2004 | 16 | 21 |
| 2005 | 16 | 12 |
| 2006 | 17 | 9 |
| 2007 | 15 | 12 |
| 2008 | 15 | 9 |
| 2009 | 14 | 12 |
| 2010 | 12 | 7 |
| 2011 | 8 | 19 |
| 2012 | 14 | 10 |
| 2013 | 11 | 11 |
| 2014 | 15 | 13 |
| 2015 | 16 | 11 |
| 2016 | 9 | 8 |
| 2017 | 13 | 7 |
| 2018 | 14 | 6 |
| 2019 | 8 | 9 |
| 2020 | 3 | 11 |
| 2021 | 9 | 7 |
| 2022 | 9 | 7 |
| 2023 | 11 | 9 |
| 2024 | 3 | 5 |
| 2025 | 6 | 8 |
| 2026 | 7 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Systems and methods for synchronizing device clocks6 Oct 2026US 12,756,491 B2Bose Corporation
- Method and apparatus for selecting clock source19 May 2026US 12,634,853 B2Huawei Technologies Co., Ltd.
- Method and apparatus for determining clock, and storage medium5 May 2026US 12,621,073 B2Huawei Technologies Co., Ltd.
- Using multiple synchronization sources to synchronize small cells31 Mar 2026US 12,593,290 B2Innowireless Co., Ltd.
- Switching system, method and apparatus of clock circuit, and non-transitory readable storage medium17 Feb 2026US 12,556,361 B2Suzhou Metabrain Intelligent Technology Co., Ltd.
- Multiple and cascaded redundant disciplined oscillator systems in a spoofing resistant reference time source system and methods thereof20 Aug 2026US 2026/0243900 A1Orolia USA Inc.
- Selecting a Best Available Precision Time Protocol (PTP) Backup when a Global Navigation Satellite System (GNSS) Clock Source is Unavailable16 Jul 2026US 2026/0205220 A1Ciena Corporation
- Synchronizing update of time of day counters using time stamp exchange over a control plane11 Jun 2026US 2026/0163665 A1Skyworks Solutions, Inc.
- Time synchronization with multi-chassis link aggregation28 May 2026US 2026/0149553 A1Hewlett Packard Enterprise Development LP
- Dynamic gap management in 5g-nr tdd systems14 May 2026US 2026/0136307 A1Intel Corporation
Most cited
By later US patents
- Network management system193US 5,726,979 AMCI, Inc. · 1998
- Method, clock generator module and receiver module for synchronizing a receiver module159US 6,816,818 B2Alcatel · 2004
- Apparatus and method for clock alignment and switching106US 5,515,403 ADSC Communications Corporation · 1996
- Network transceiver having circuitry for referencing transmit data to a selected input clock104US 6,430,695 B1Advanced Micro Devices, Inc. · 2002
- Timing synchronization and switchover in a network switch100US 6,078,595 AAscend Communications, Inc. · 2000