H04J 14/0297
Optical equipment protection
Official title: {Optical equipment protection}
H04J14/0297 (Optical equipment protection) appears on 289 US grants and 281 published applications in this corpus.
Search patents in H04J- Granted patents
- 289
- Published applications
- 281
- Assignees
- 142
- Inventors
- 645
- Latest grant
- 17 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 5 | 0 |
| 1999 | 6 | 0 |
| 2000 | 4 | 0 |
| 2001 | 13 | 5 |
| 2002 | 10 | 28 |
| 2003 | 12 | 25 |
| 2004 | 16 | 30 |
| 2005 | 19 | 24 |
| 2006 | 16 | 22 |
| 2007 | 22 | 19 |
| 2008 | 15 | 8 |
| 2009 | 15 | 10 |
| 2010 | 19 | 18 |
| 2011 | 5 | 8 |
| 2012 | 11 | 10 |
| 2013 | 12 | 4 |
| 2014 | 13 | 4 |
| 2015 | 6 | 7 |
| 2016 | 11 | 10 |
| 2017 | 6 | 8 |
| 2018 | 10 | 6 |
| 2019 | 5 | 9 |
| 2020 | 9 | 6 |
| 2021 | 4 | 4 |
| 2022 | 5 | 3 |
| 2023 | 4 | 7 |
| 2024 | 4 | 4 |
| 2025 | 4 | 0 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Communication network optical apparatus and method of providing an optical signal17 Mar 2026US 12,580,661 B2Telefonaktiebolaget LM Ericsson (publ)
- Method and apparatus for detecting failure of passive wavelength division equipment, server, and storage medium3 Mar 2026US 12,567,905 B2Zte Corporation
- Optical add/drop multiplexer and optical transmission method4 Nov 2025US 12,463,725 B2NEC Corporation
- Optical transmission device, system, and method13 May 2025US 12,301,292 B2Huawei Technologies Co., Ltd.
- Stretched single optical span communications system and method avoiding hazardous power levels15 Apr 2025US 12,278,693 B2Ciena Corporation
- Stretched single optical span communications system and method avoiding hazardous power levels24 Sep 2026US 2026/0291637 A1Ciena Corporation
- Optical communication apparatus and optical communication method12 Feb 2026US 2026/0046537 A1NTT, Inc.
- Fiber indexing systems7 Nov 2024US 2024/0369791 A1CommScope Technologies LLC
- Communication Network Optical Apparatus and Method of Providing an Optical Signal1 Aug 2024US 2024/0259106 A1Telefonaktiebolaget LM Ericsson (publ)
- Stretched single optical span communications system and method avoiding hazardous power levels6 Jun 2024US 2024/0187123 A1Ciena Corporation
Most cited
By later US patents
- 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
- Optical wavelength division multiplexed network system110US 5,717,795 AKabushiki Kaisha Toshiba · 1998
- Optical communication system which determines the spectrum of a wavelength division multiplexed signal and performs various processes in accordance with the determined spectrum109US 5,894,362 AFujitsu Limited · 1999