H04B 10/297
Bidirectional amplification
H04B10/297 (Bidirectional amplification) appears on 167 US grants and 121 published applications in this corpus.
Search patents in H04B- Granted patents
- 167
- Published applications
- 121
- Assignees
- 83
- Inventors
- 336
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 4 | 0 |
| 1995 | 1 | 0 |
| 1996 | 5 | 0 |
| 1997 | 4 | 0 |
| 1998 | 8 | 0 |
| 1999 | 5 | 0 |
| 2000 | 11 | 0 |
| 2001 | 14 | 4 |
| 2002 | 13 | 13 |
| 2003 | 5 | 6 |
| 2004 | 7 | 13 |
| 2005 | 8 | 3 |
| 2006 | 5 | 3 |
| 2007 | 7 | 2 |
| 2008 | 4 | 2 |
| 2009 | 2 | 3 |
| 2010 | 2 | 5 |
| 2011 | 2 | 0 |
| 2012 | 3 | 1 |
| 2013 | 2 | 3 |
| 2014 | 4 | 2 |
| 2015 | 3 | 2 |
| 2016 | 1 | 3 |
| 2017 | 5 | 3 |
| 2018 | 3 | 7 |
| 2019 | 3 | 3 |
| 2020 | 5 | 12 |
| 2021 | 8 | 9 |
| 2022 | 10 | 6 |
| 2023 | 3 | 4 |
| 2024 | 2 | 3 |
| 2025 | 3 | 5 |
| 2026 | 3 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Optical relay device and signal transmission system1 Sep 2026US 12,726,274 B2Boe Technology Group Co., Ltd.
- Terrestrial repeater and optimized repeater spacing28 Apr 2026US 12,615,089 B2Subcom, LLC
- Optical amplification apparatus and signal amplification method of optical amplification apparatus21 Apr 2026US 12,609,505 B2Huawei Technologies Co., Ltd.
- Monitoring signal light output apparatus, submarine apparatus, and optical communication system21 Oct 2025US 12,451,962 B2NEC Corporation
- System, apparatus and method for two-way transport of data over a single fiber strand1 Apr 2025US 12,267,109 B2NOVEC Solutions, Inc.
- Optical communication device, optical amplifier, and optical amplification method3 Sep 2026US 2026/0261355 A11FINITY Inc.
- Optical monitoring device, optical transmission system, and optical monitoring method30 Jul 2026US 2026/0222063 A1NEC Corporation
- Full duplex electrical communication adapted to optical link9 Jul 2026US 2026/0197084 A1Analog Devices, Inc.
- Optical transmission apparatus, optical transmission system, and optical transmission method22 Jan 2026US 2026/0025206 A1Fujitsu Limited
- Bidirectional loopback amplifier for optical sensing applications4 Sep 2025US 2025/0279827 A1Subcom, LLC
Most cited
By later US patents
- Method of determining optical amplifier failures137US 6,064,501 ANortel Networks Limited · 2000
- Bidirectional WDM optical communication systems with bidirectional optical amplifiers135US 5,742,416 ACiena Corporation · 1998
- Unidirectional amplification for bi-directional transmission using wavelength-division multiplexing99US 5,452,124 AWilliams Telecommunications Group, Inc. · 1995
- Multichannel optical fiber communications89US 5,633,741 ALucent Technologies Inc. · 1997
- Highly scalable modular optical amplifier based subsystem82US 6,236,499 B1Nortel Networks Limited · 2001