H04J 14/0293
Optical channel protection
Official title: {Optical channel protection}
H04J14/0293 (Optical channel protection) appears on 619 US grants and 607 published applications in this corpus.
Search patents in H04J- Granted patents
- 619
- Published applications
- 607
- Assignees
- 200
- Inventors
- 1,274
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 4 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 5 | 0 |
| 1999 | 12 | 0 |
| 2000 | 11 | 0 |
| 2001 | 23 | 9 |
| 2002 | 23 | 73 |
| 2003 | 30 | 51 |
| 2004 | 29 | 63 |
| 2005 | 35 | 52 |
| 2006 | 39 | 40 |
| 2007 | 45 | 23 |
| 2008 | 32 | 22 |
| 2009 | 37 | 25 |
| 2010 | 42 | 24 |
| 2011 | 16 | 20 |
| 2012 | 19 | 18 |
| 2013 | 17 | 24 |
| 2014 | 28 | 15 |
| 2015 | 22 | 26 |
| 2016 | 24 | 13 |
| 2017 | 22 | 18 |
| 2018 | 13 | 9 |
| 2019 | 16 | 15 |
| 2020 | 14 | 9 |
| 2021 | 7 | 19 |
| 2022 | 13 | 7 |
| 2023 | 11 | 14 |
| 2024 | 13 | 8 |
| 2025 | 6 | 4 |
| 2026 | 4 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- FlexO/ZR subrating and partial survivability21 Apr 2026US 12,609,766 B2Ciena Corporation
- Optical path route design device and optical path route design method17 Mar 2026US 12,581,223 B2NTT, Inc.
- Connection node apparatus, optical transmission system, and connection method10 Mar 2026US 12,574,666 B2NTT, Inc.
- API based inter-node control plane communication infrastructure3 Mar 2026US 12,567,906 B2Infinera Corporation
- Data storage23 Sep 2025US 12,425,451 B2Nokia Technologies Oy
- Stretched single optical span communications system and method avoiding hazardous power levels24 Sep 2026US 2026/0291637 A1Ciena Corporation
- Wavelength Management in Multi-Rail Optical Networks13 Aug 2026US 2026/0238373 A1Ciena Corporation
- Coordinated Layer-0 and Layer-1 Control for Right-Sizing Optical Interfaces6 Aug 2026US 2026/0230177 A1Ciena Corporation
- Connection Node Apparatus, Optical Transmission System, And Connection Method25 Jun 2026US 2026/0181289 A1NTT, Inc.
- Optical protection switching based on intradyne signal detection23 Apr 2026US 2026/0113139 A1Cisco Technology, Inc.
Most cited
By later US patents
- Method and system for detecting optical faults within the optical domain of a fiber communication network248US 6,005,694 AMCI WorldCom, Inc. · 1999
- Method and apparatus for multiplexing in a wireless communication infrastructure211US 6,826,163 B2NEXTG Networks · 2004
- Method and apparatus for multiplexing in a wireless communication infrastructure201US 6,826,164 B2NEXTG Networks · 2004
- Inter-ring cross-connect for survivable multi-wavelength optical communication networks178US 6,226,111 B1Telcordia Technologies, Inc. · 2001
- System and method for packet level distributed routing in fiber optic rings168US 6,532,088 B1Alcatel · 2003