H04J 14/0221
Power control
Official title: {Power control, e.g. to keep the total optical power constant}
H04J14/0221 (Power control) appears on 1,211 US grants and 1,128 published applications in this corpus.
Search patents in H04J- Granted patents
- 1,211
- Published applications
- 1,128
- Assignees
- 282
- Inventors
- 1,903
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 5 | 0 |
| 1996 | 4 | 0 |
| 1997 | 7 | 0 |
| 1998 | 19 | 0 |
| 1999 | 35 | 0 |
| 2000 | 39 | 0 |
| 2001 | 47 | 16 |
| 2002 | 48 | 69 |
| 2003 | 60 | 65 |
| 2004 | 47 | 85 |
| 2005 | 44 | 46 |
| 2006 | 50 | 41 |
| 2007 | 56 | 49 |
| 2008 | 26 | 35 |
| 2009 | 42 | 50 |
| 2010 | 44 | 35 |
| 2011 | 37 | 43 |
| 2012 | 42 | 60 |
| 2013 | 41 | 33 |
| 2014 | 52 | 53 |
| 2015 | 67 | 47 |
| 2016 | 46 | 60 |
| 2017 | 69 | 37 |
| 2018 | 42 | 40 |
| 2019 | 41 | 43 |
| 2020 | 35 | 29 |
| 2021 | 25 | 18 |
| 2022 | 25 | 32 |
| 2023 | 28 | 52 |
| 2024 | 31 | 38 |
| 2025 | 25 | 35 |
| 2026 | 28 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Single span calibration in a multi-span optical line system15 Sep 2026US 12,739,540 B2Ciena Corporation
- Optical transmission system, optical device, and optical processing method8 Sep 2026US 12,732,274 B2NEC Corporation
- Multi-band coexistence element8 Sep 2026US 12,732,276 B2Verizon Patent and Licensing Inc.
- Multi-band coexistence element18 Aug 2026US 12,712,635 B2Verizon Patent and Licensing Inc.
- Alien wavelength management11 Aug 2026US 12,706,672 B2Zayo Group, LLC
- Adjustable variable splitters for power consumption optimization in passive optical networks1 Oct 2026US 2026/0303249 A1Nokia Solutions and Networks Oy
- Signal flatness adjustment method, electronic device and computer-readable medium24 Sep 2026US 2026/0291610 A1Zte Corporation
- Power regulation method and optical communication system3 Sep 2026US 2026/0261354 A1Zte Corporation
- Optical communication device, optical amplifier, and optical amplification method3 Sep 2026US 2026/0261355 A11FINITY Inc.
- Multi-band coexistence element16 Jul 2026US 2026/0205199 A1Frontier Communications Holdings, LLC
Most cited
By later US patents
- Optical transmission system equalizer176US 5,225,922 AAT&T Bell Laboratories · 1993
- Method of activating optical communication system, channel increasing/decreasing method, and computer-readable recording medium165US 6,839,160 B2Fujitsu Limited · 2005
- Attenuation device for wavelength multiplexed optical fiber communications135US 5,745,271 ALucent Technologies Inc. · 1998
- Method and apparatus for channel equalization in wavelength division multiplexed systems133US 6,040,933 ANortel Networks Limited · 2000
- Apparatus and method for optical equalization and amplification111US 5,812,710 AFujitsu Limited · 1998