H04J 14/0256
At the optical channel layer
Official title: {at the optical channel layer}
H04J14/0256 (At the optical channel layer) appears on 974 US grants and 1,088 published applications in this corpus.
Search patents in H04J- Granted patents
- 974
- Published applications
- 1,088
- Assignees
- 222
- Inventors
- 1,537
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 2 |
| 2003 | 1 | 12 |
| 2004 | 1 | 8 |
| 2005 | 0 | 9 |
| 2006 | 9 | 5 |
| 2007 | 7 | 10 |
| 2008 | 7 | 8 |
| 2009 | 14 | 43 |
| 2010 | 20 | 58 |
| 2011 | 23 | 61 |
| 2012 | 42 | 116 |
| 2013 | 70 | 88 |
| 2014 | 98 | 74 |
| 2015 | 97 | 74 |
| 2016 | 84 | 76 |
| 2017 | 84 | 86 |
| 2018 | 76 | 69 |
| 2019 | 98 | 64 |
| 2020 | 61 | 51 |
| 2021 | 43 | 53 |
| 2022 | 44 | 42 |
| 2023 | 40 | 34 |
| 2024 | 23 | 19 |
| 2025 | 19 | 15 |
| 2026 | 9 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Optical network unit, central office node and methods of configuring an optical network unit22 Sep 2026US 12,744,616 B2Telefonaktiebolaget LM Ericsson (publ)
- Initiating a communication or connectivity service between a first location and a second location based on optical data transmission of a user-defined optical signal15 Sep 2026US 12,739,048 B2Deutsche Telekom AG
- Fronthaul network units and methods therein for synchronization over a single optical fiber in a frontahul network4 Aug 2026US 12,700,944 B2Telefonaktiebolaget LM Ericsson (publ)
- Optical signal monitor, optical wavelength multiplexing transmitter, and method for monitoring optical signal28 Jul 2026US 12,695,505 B2Radiant Patents LLC
- End-to-end secure communications for privileged 5G network traffic16 Jun 2026US 12,659,792 B2Microsoft Technology Licensing, LLC
- Optical transmission system, optical transmission apparatus and optical transmission method27 Aug 2026US 2026/0254552 A1NTT, Inc.
- Gnsr-aware spectral slot assignment with wavelength converters6 Aug 2026US 2026/0230214 A11FINITY Inc.
- Network sub-system23 Jul 2026US 2026/0213846 A1Oriole Networks Ltd.
- Programmable Wavelength-Selective Splitter23 Jul 2026US 2026/0213867 A1
- Technology-aware optical device for an optical network28 May 2026US 2026/0149524 A1Nokia Solutions and Networks Oy
Most cited
By later US patents
- Transmitter photonic integrated circuit (TxPIC) chips78US 7,885,492 B2Infinera Corporation · 2011
- Optical power management in an optical network72US 6,304,347 B1ONI Systems Corp. · 2001
- Wavelength division multiplexed optical communication system architectures65US 8,655,190 B2Infinera Corporation · 2014
- Methods and systems for using modulation frequencies for optical channel monitoring with periodic optical filtering57US 9,485,554 B1Fujitsu Limited · 2016
- Multi-chassis router with multiplexed optical interconnects56US 8,050,559 B2Juniper Networks, Inc. · 2011