H04J 14/02
Wavelength-division multiplex systems
H04J14/02 (Wavelength-division multiplex systems) appears on 8,793 US grants and 8,765 published applications in this corpus.
Search patents in H04J- Granted patents
- 8,793
- Published applications
- 8,765
- Assignees
- 1,489
- Inventors
- 10,907
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 8 | 0 |
| 1988 | 8 | 0 |
| 1989 | 8 | 0 |
| 1990 | 10 | 0 |
| 1991 | 12 | 0 |
| 1992 | 22 | 0 |
| 1993 | 22 | 0 |
| 1994 | 38 | 0 |
| 1995 | 32 | 0 |
| 1996 | 58 | 0 |
| 1997 | 67 | 0 |
| 1998 | 123 | 0 |
| 1999 | 140 | 0 |
| 2000 | 166 | 0 |
| 2001 | 207 | 105 |
| 2002 | 245 | 491 |
| 2003 | 300 | 390 |
| 2004 | 258 | 428 |
| 2005 | 232 | 348 |
| 2006 | 345 | 299 |
| 2007 | 323 | 349 |
| 2008 | 279 | 286 |
| 2009 | 272 | 349 |
| 2010 | 293 | 312 |
| 2011 | 239 | 279 |
| 2012 | 284 | 372 |
| 2013 | 322 | 363 |
| 2014 | 388 | 377 |
| 2015 | 426 | 415 |
| 2016 | 407 | 388 |
| 2017 | 459 | 409 |
| 2018 | 375 | 380 |
| 2019 | 465 | 390 |
| 2020 | 400 | 369 |
| 2021 | 332 | 303 |
| 2022 | 304 | 300 |
| 2023 | 266 | 349 |
| 2024 | 254 | 273 |
| 2025 | 203 | 256 |
| 2026 | 189 | 185 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H04J 14/0227Operation, administration, maintenance or provisioning [oamp] of wdm networks3,780
- H04J 14/0278Wdm optical network architectures2,930
- H04J 14/0201Add-and-drop multiplexing2,512
- H04J 14/0221Power control1,211
- H04J 14/0287Protection in wdm systems1,142
- H04J 14/03Wdm arrangements1,139
- H04J 14/0298With sub-carrier multiplexing [scm]785
- H04J 14/0226Fixed carrier allocation540
All 10 subgroupsShow fewer
Recent patents
- Technologies for optical demultiplexing with backwards compatibility6 Oct 2026US 12,754,364 B2Intel Corporation
- Optical time domain reflectometer (OTDR)-based fiber monitoring optimization6 Oct 2026US 12,756,459 B2Viavi Solutions Inc.
- Optical transmitter including splitting elements, external modulators, and wavelength multiplexers, and optical transceiver including polarization separation elements, wavelength demultiplexers, polarization rotation elements, and photodetectors6 Oct 2026US 12,756,476 B2Mitsubishi Electric Corporation
- Optical fiber input/output tray with wavelength division multiplexing support for a co-packaged optical switch6 Oct 2026US 12,756,492 B2Quanta Computer Inc.
- Electrical-to-coherent optical-to-electrical data communication cable assembly29 Sep 2026US 12,750,139 B2
- Clock forwarding in packaged optics links8 Oct 2026US 2026/0312713 A1Lightmatter, Inc.
- Parallelized Optical Link Calibration Over an Optical Section8 Oct 2026US 2026/0312714 A1Ciena Corporation
- Wavelength cross connect device, and wavelength cross connect method8 Oct 2026US 2026/0313275 A1NTT, Inc.
- Optical transmission device and optical transmission method1 Oct 2026US 2026/0303209 A1NTT, Inc.
- Dual-polarization bidirectional optical devices1 Oct 2026US 2026/0303218 A1
Most cited
By later US patents
- Interactive information services control system642US 5,481,542 AScientific-Atlanta, Inc. · 1996
- Radio communication system572US 7,043,271 B1Kabushiki Kaisha Toshiba · 2006
- Digital communication network architecture for providing universal information services520US 4,763,317 AAmerican Telephone and Telegraph Company, AT&T Bell Laboratories · 1988
- System and method for optical coherence imaging448US 7,366,376 B2The General Hospital Corporation · 2008
- Frequency-shifted feedback cavity used as a phased array antenna controller and carrier interference multiple access spread-spectrum transmitter445US 5,955,992 A1999