H04B 10/2912
Characterised by the medium used for amplification or processing
Official title: {characterised by the medium used for amplification or processing}
H04B10/2912 (Characterised by the medium used for amplification or processing) appears on 1,105 US grants and 788 published applications in this corpus.
Search patents in H04B- Granted patents
- 1,105
- Published applications
- 788
- Assignees
- 273
- Inventors
- 1,471
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 7 | 0 |
| 1990 | 10 | 0 |
| 1991 | 10 | 0 |
| 1992 | 11 | 0 |
| 1993 | 23 | 0 |
| 1994 | 25 | 0 |
| 1995 | 26 | 0 |
| 1996 | 35 | 0 |
| 1997 | 25 | 0 |
| 1998 | 36 | 0 |
| 1999 | 41 | 0 |
| 2000 | 41 | 0 |
| 2001 | 41 | 16 |
| 2002 | 53 | 87 |
| 2003 | 70 | 83 |
| 2004 | 71 | 85 |
| 2005 | 61 | 90 |
| 2006 | 83 | 38 |
| 2007 | 60 | 48 |
| 2008 | 42 | 21 |
| 2009 | 32 | 26 |
| 2010 | 28 | 16 |
| 2011 | 21 | 20 |
| 2012 | 15 | 16 |
| 2013 | 16 | 17 |
| 2014 | 18 | 14 |
| 2015 | 18 | 14 |
| 2016 | 15 | 14 |
| 2017 | 21 | 16 |
| 2018 | 15 | 14 |
| 2019 | 15 | 13 |
| 2020 | 6 | 16 |
| 2021 | 16 | 14 |
| 2022 | 16 | 25 |
| 2023 | 17 | 21 |
| 2024 | 15 | 24 |
| 2025 | 10 | 20 |
| 2026 | 18 | 20 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Technique to reduce signal crosstalk between cores in a multi-core optical fiber transmission8 Sep 2026US 12,732,300 B2NTT, Inc.
- Optical signal amplification18 Aug 2026US 12,712,330 B21FINITY Inc.
- Method and device for optical power limiter11 Aug 2026US 12,704,747 B2National University of Singapore
- Optical transmission system30 Jun 2026US 12,671,499 B2NTT, Inc.
- Optical waveguide amplifiers with doped silicon-based core2 Jun 2026US 12,646,903 B2Hewlett Packard Enterprise Development LP
- Optical transmission device and optical transmission method1 Oct 2026US 2026/0303209 A1NTT, Inc.
- Optical communication device, optical amplifier, and optical amplification method3 Sep 2026US 2026/0261355 A11FINITY Inc.
- Optical amplification relay device, optical transmission system and optical amplification relay method20 Aug 2026US 2026/0246534 A1NTT, Inc.
- Device for providing enhanced chromatic dispersion tolerance and/or optical signal-to-noise ratio in a passive optical network30 Jul 2026US 2026/0222069 A1Precision Optical Transceivers Inc.
- Raman Gain Measurements in Dynamically Controlled Optical Line Systems16 Jul 2026US 2026/0205194 A1Ciena Corporation
Most cited
By later US patents
- Optical communication systems using raman repeaters and components therefor167US 4,616,898 APolaroid Corporation · 1986
- 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
- Method of upgrading transmission capacity by Raman amplification130US 5,959,750 ALucent Technologies Inc. · 1999
- Optical communication system using multiple-order Raman amplifiers127US 6,163,636 ALucent Technologies Inc. · 2000