H04J 14/02122
Colourless, directionless or contentionless [cdc] arrangements
Official title: {Colourless, directionless or contentionless [CDC] arrangements}
H04J14/02122 (Colourless, directionless or contentionless [cdc] arrangements) appears on 180 US grants and 219 published applications in this corpus.
Search patents in H04J- Granted patents
- 180
- Published applications
- 219
- Assignees
- 59
- Inventors
- 280
- Latest grant
- 20 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2004 | 1 | 3 |
| 2005 | 0 | 1 |
| 2006 | 0 | 1 |
| 2007 | 2 | 0 |
| 2008 | 1 | 6 |
| 2009 | 0 | 7 |
| 2010 | 1 | 9 |
| 2011 | 3 | 11 |
| 2012 | 7 | 19 |
| 2013 | 14 | 12 |
| 2014 | 18 | 17 |
| 2015 | 14 | 20 |
| 2016 | 11 | 18 |
| 2017 | 21 | 13 |
| 2018 | 16 | 21 |
| 2019 | 21 | 12 |
| 2020 | 15 | 16 |
| 2021 | 11 | 7 |
| 2022 | 9 | 6 |
| 2023 | 3 | 7 |
| 2024 | 5 | 3 |
| 2025 | 5 | 7 |
| 2026 | 2 | 3 |
By publication year. 2026 runs to 8 Oct.
Recent patents
- Wavelength selective switching apparatus and related method20 Jan 2026US 12,532,094 B2Huawei Technologies Co., Ltd.
- Wavelength selective switch, optical switching device, and system6 Jan 2026US 12,520,066 B2Huawei Technologies Co., Ltd.
- Optical add/drop multiplexer and optical transmission method4 Nov 2025US 12,463,725 B2NEC Corporation
- ROADM architecture for wide spectrum channels30 Sep 2025US 12,432,004 B2Ciena Corporation
- Routing and regenerator planning in a carrier's core reconfigurable optical network3 Jun 2025US 12,323,231 B2AT&T Intellectual Property I, L. P.
- Channel bandwidth allocation method to increase effective roadm dwdm network capacity21 May 2026US 2026/0143265 A1AT&T Intellectual Property I, L. P.
- Optical Switch, and Method of Configuring an Optical Switch15 Jan 2026US 2026/0019186 A1
- Multi-stage reconfigurable add-drop multiplexer8 Jan 2026US 2026/0012281 A1
- High-degree reconfigurable add-drop multiplexer4 Dec 2025US 2025/0373355 A1Huawei Technologies Co., Ltd.
- Distributed device cluster30 Oct 2025US 2025/0337514 A1
Most cited
By later US patents
- Directionless reconfigurable optical add-drop multiplexer systems and methods34US 8,625,994 B2Ciena Corporation · 2014
- High capacity fiber-optic integrated transmission and switching systems34US 9,124,383 B1Ciena Corporation · 2015
- Modular WSS-based communications system with colorless add/drop interfaces27US 7,983,560 B2Dynamic Method Enterprises Limited · 2011
- Systems and methods modeling optical sources in optical spectrum controllers for control thereof27US 9,986,317 B1Ciena Corporation · 2018
- Photonic routing systems and methods for loop avoidance25US 8,509,618 B2Ciena Corporation · 2013