H04J 3/00
Time-division multiplex systems
Official title: Time-division multiplex systems (H04J14/00 takes precedence; relay systems H04B7/14; selecting techniques H04Q)
H04J3/00 (Time-division multiplex systems) appears on 14,734 US grants and 11,255 published applications in this corpus.
Search patents in H04J- Granted patents
- 14,734
- Published applications
- 11,255
- Assignees
- 2,803
- Inventors
- 22,606
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 70 | 0 |
| 1977 | 68 | 0 |
| 1978 | 59 | 0 |
| 1979 | 52 | 0 |
| 1980 | 46 | 0 |
| 1981 | 51 | 0 |
| 1982 | 69 | 0 |
| 1983 | 59 | 0 |
| 1984 | 53 | 0 |
| 1985 | 59 | 0 |
| 1986 | 62 | 0 |
| 1987 | 80 | 0 |
| 1988 | 112 | 0 |
| 1989 | 136 | 0 |
| 1990 | 124 | 0 |
| 1991 | 139 | 0 |
| 1992 | 149 | 0 |
| 1993 | 153 | 0 |
| 1994 | 215 | 0 |
| 1995 | 214 | 0 |
| 1996 | 293 | 0 |
| 1997 | 259 | 0 |
| 1998 | 393 | 0 |
| 1999 | 329 | 0 |
| 2000 | 293 | 0 |
| 2001 | 310 | 132 |
| 2002 | 291 | 472 |
| 2003 | 347 | 497 |
| 2004 | 358 | 488 |
| 2005 | 356 | 439 |
| 2006 | 475 | 453 |
| 2007 | 382 | 571 |
| 2008 | 459 | 507 |
| 2009 | 460 | 496 |
| 2010 | 506 | 487 |
| 2011 | 482 | 414 |
| 2012 | 508 | 422 |
| 2013 | 510 | 560 |
| 2014 | 592 | 546 |
| 2015 | 601 | 571 |
| 2016 | 586 | 514 |
| 2017 | 519 | 355 |
| 2018 | 474 | 396 |
| 2019 | 480 | 398 |
| 2020 | 431 | 444 |
| 2021 | 394 | 411 |
| 2022 | 403 | 377 |
| 2023 | 387 | 415 |
| 2024 | 354 | 387 |
| 2025 | 337 | 305 |
| 2026 | 195 | 198 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H04J 3/02Details11,447
- H04J 3/16In which the time allocation to individual channels within a transmission cycle3,678
- H04J 3/24In which the allocation is indicated by an address the different channels449
- H04J 3/22In which the sources have different rates or codes172
- H04J 3/17In which the transmission channel allotted to a first user may be142
- H04J 3/18Time-division multiplex systems: using frequency compression and subsequent expansion of the individual49
- H04J 3/20Time-division multiplex systems: using resonant transfer7
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.
- Otn device, service management system, and automatic connection method of otn sub-device8 Oct 2026US 2026/0312712 A1Zte Corporation
- Small form-factor pluggable device8 Oct 2026US 2026/0312903 A1Schweitzer Engineering Laboratories, Inc.
- Sensing-based clock synchronization8 Oct 2026US 2026/0313614 A1QUALCOMM Incorporated
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
- Method and apparatus for demodulating signals in a pulse oximetry system1,090US 6,229,856 B1Masimo Corporation · 2001
- Method and apparatus for demodulating signals in a pulse oximetry system1,044US 6,643,530 B2Masimo Corporation · 2003