H04B 10/2971
A single amplifier for both directions
Official title: {A single amplifier for both directions}
H04B10/2971 (A single amplifier for both directions) appears on 62 US grants and 36 published applications in this corpus.
Search patents in H04B- Granted patents
- 62
- Published applications
- 36
- Assignees
- 39
- Inventors
- 130
- Latest grant
- 21 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 4 | 0 |
| 1997 | 1 | 0 |
| 1998 | 6 | 0 |
| 1999 | 3 | 0 |
| 2000 | 4 | 0 |
| 2001 | 6 | 2 |
| 2002 | 7 | 4 |
| 2003 | 1 | 3 |
| 2004 | 1 | 6 |
| 2005 | 3 | 1 |
| 2006 | 1 | 1 |
| 2007 | 3 | 1 |
| 2008 | 2 | 2 |
| 2009 | 1 | 1 |
| 2010 | 2 | 2 |
| 2011 | 2 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 1 |
| 2014 | 0 | 1 |
| 2015 | 2 | 0 |
| 2016 | 0 | 1 |
| 2017 | 1 | 1 |
| 2018 | 1 | 2 |
| 2019 | 0 | 1 |
| 2020 | 2 | 0 |
| 2021 | 2 | 2 |
| 2022 | 0 | 1 |
| 2023 | 1 | 1 |
| 2024 | 1 | 1 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Monitoring signal light output apparatus, submarine apparatus, and optical communication system21 Oct 2025US 12,451,962 B2NEC Corporation
- Colorless splitter/combiner cable assembly8 Oct 2024US 12,113,574 B2II-Vi Delaware, Inc.
- Device and method for processing an optical signal7 Nov 2023US 11,811,455 B2Telefonaktiebolaget LM Ericsson (publ)
- Pluggable optical amplifier for datacenter interconnects16 Nov 2021US 11,177,886 B2II-Vi Delaware, Inc.
- System and method of optical fiber communication4 May 2021US 10,998,977 B2Neptune Subsea IP Limited
- Amplification method in a pon access network, computer program product, corresponding optical line termination device5 Jun 2025US 2025/0184004 A1
- Pluggable optical amplifier for datacenter interconnects19 Dec 2024US 2024/0421908 A1II-Vi Delaware, Inc.
- Monitoring signal light output apparatus, submarine apparatus, and optical communication system9 Mar 2023US 2023/0076588 A1NEC Corporation
- Pluggable optical amplifier for datacenter interconnects17 Mar 2022US 2022/0085889 A1II-Vi Delaware, Inc.
- Pluggable optical amplifier for datacenter interconnects9 Sep 2021US 2021/0281323 A1II-Vi Delaware, Inc.
Most cited
By later US patents
- Method of determining optical amplifier failures137US 6,064,501 ANortel Networks Limited · 2000
- Unidirectional amplification for bi-directional transmission using wavelength-division multiplexing99US 5,452,124 AWilliams Telecommunications Group, Inc. · 1995
- Bidirectional WDM optical communication systems with bidirectional optical amplifiers63US 5,812,306 ACiena Corporation · 1998
- Optical fiber amplifier and optical fiber transmission system43US 5,563,733 AMatsushita Electric Industrial Co., Ltd. · 1996
- Bidirectional optical telecommunication system comprising a bidirectional optical amplifier43US 5,995,259 APirelli Cavi S.p.A. · 1999