H04J 3/0638
Clock or time synchronisation among nodes
Official title: {Clock or time synchronisation among nodes; Internode synchronisation (synchronization for ring networks H04L12/422; data switching networks with synchronous transmission H04L12/43)}
H04J3/0638 (Clock or time synchronisation among nodes) appears on 3,940 US grants and 4,212 published applications in this corpus.
Search patents in H04J- Granted patents
- 3,940
- Published applications
- 4,212
- Assignees
- 1,263
- Inventors
- 7,096
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 5 | 0 |
| 1988 | 4 | 0 |
| 1989 | 9 | 0 |
| 1990 | 5 | 0 |
| 1991 | 10 | 0 |
| 1992 | 5 | 0 |
| 1993 | 7 | 0 |
| 1994 | 8 | 0 |
| 1995 | 16 | 0 |
| 1996 | 21 | 0 |
| 1997 | 19 | 0 |
| 1998 | 15 | 0 |
| 1999 | 20 | 0 |
| 2000 | 33 | 0 |
| 2001 | 30 | 17 |
| 2002 | 37 | 73 |
| 2003 | 36 | 89 |
| 2004 | 42 | 97 |
| 2005 | 51 | 103 |
| 2006 | 108 | 92 |
| 2007 | 67 | 118 |
| 2008 | 74 | 110 |
| 2009 | 91 | 113 |
| 2010 | 103 | 177 |
| 2011 | 129 | 147 |
| 2012 | 135 | 152 |
| 2013 | 156 | 200 |
| 2014 | 199 | 194 |
| 2015 | 206 | 191 |
| 2016 | 205 | 238 |
| 2017 | 204 | 168 |
| 2018 | 204 | 173 |
| 2019 | 230 | 184 |
| 2020 | 187 | 222 |
| 2021 | 202 | 234 |
| 2022 | 228 | 239 |
| 2023 | 223 | 261 |
| 2024 | 227 | 269 |
| 2025 | 239 | 215 |
| 2026 | 136 | 136 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Systems and methods for synchronizing device clocks6 Oct 2026US 12,756,491 B2Bose Corporation
- System information block delivery in sidelink6 Oct 2026US 12,757,140 B2QUALCOMM Incorporated
- Communication apparatus, control method for communication apparatus, and storage medium29 Sep 2026US 12,750,147 B2Canon Kabushiki Kaisha
- Communication system with enhanced user datagram protocol support for precision time protocol29 Sep 2026US 12,750,148 B2Outdoor Wireless Networks LLC
- Apparatus and method for two-way delay error compensation in communication system29 Sep 2026US 12,750,149 B2Electronics and Telecommunications Research Institute
- Communication method and apparatus8 Oct 2026US 2026/0312710 A1Huawei Technologies Co., Ltd.
- Time synchronization techniques8 Oct 2026US 2026/0312711 A1Dell Products L. P.
- Small form-factor pluggable device8 Oct 2026US 2026/0312903 A1Schweitzer Engineering Laboratories, Inc.
- Sensing-based clock synchronization8 Oct 2026US 2026/0313614 A1QUALCOMM Incorporated
- Secondary reference time validation1 Oct 2026US 2026/0303245 A1Nokia Solutions and Networks Oy
Most cited
By later US patents
- System and method for synchronizing operations among a plurality of independently clocked digital data processing devices1,949US 8,234,395 B2Sonos, Inc. · 2012
- Multimedia wired/wireless content synchronization system and method1,810US 6,631,410 B1Sharp Laboratories of America, Inc. · 2003
- System for synchronizing a plurality of nodes to concurrently generate output signals by adjusting relative timelags based on a maximum estimated timelag1,773US 5,923,902 AYamaha Corporation · 1999
- Lower overhead method for data transmission using ATM and SCDMA over hybrid fiber coax cable plant683US 5,991,308 ATerayon Communication Systems, Inc. · 1999
- Method for frequency division duplex communications526US 5,933,421 AAT&T Wireless Services, Inc. · 1999