G02B 6/2931
Diffractive element operating in reflection
Official title: {Diffractive element operating in reflection}
G02B6/2931 (Diffractive element operating in reflection) appears on 568 US grants and 415 published applications in this corpus.
Search patents in G02B- Granted patents
- 568
- Published applications
- 415
- Assignees
- 249
- Inventors
- 897
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 6 | 0 |
| 1988 | 13 | 0 |
| 1989 | 5 | 0 |
| 1990 | 7 | 0 |
| 1991 | 4 | 0 |
| 1992 | 4 | 0 |
| 1993 | 0 | 0 |
| 1994 | 7 | 0 |
| 1995 | 7 | 0 |
| 1996 | 5 | 0 |
| 1997 | 2 | 0 |
| 1998 | 5 | 0 |
| 1999 | 5 | 0 |
| 2000 | 11 | 0 |
| 2001 | 23 | 5 |
| 2002 | 38 | 62 |
| 2003 | 40 | 67 |
| 2004 | 54 | 44 |
| 2005 | 40 | 35 |
| 2006 | 45 | 24 |
| 2007 | 41 | 19 |
| 2008 | 26 | 15 |
| 2009 | 15 | 24 |
| 2010 | 16 | 12 |
| 2011 | 14 | 15 |
| 2012 | 17 | 9 |
| 2013 | 12 | 9 |
| 2014 | 7 | 10 |
| 2015 | 12 | 3 |
| 2016 | 9 | 11 |
| 2017 | 8 | 6 |
| 2018 | 4 | 5 |
| 2019 | 9 | 5 |
| 2020 | 8 | 4 |
| 2021 | 5 | 7 |
| 2022 | 6 | 5 |
| 2023 | 6 | 6 |
| 2024 | 5 | 5 |
| 2025 | 2 | 3 |
| 2026 | 4 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Wavelength selective switching apparatus and related method20 Jan 2026US 12,532,094 B2Huawei Technologies Co., Ltd.
- Wavelength selective switch30 Dec 2025US 12,510,713 B2Huawei Technologies Co., Ltd.
- Wavelength Selective Device and Corresponding Switching Device30 Apr 2026US 2026/0118587 A1Huawei Technologies Co., Ltd.
- Variable optical attenuator array, and power adjustment device23 Apr 2026US 2026/0110843 A1Huawei Technologies Co., Ltd.
- C and l banded wavelength selective switch with high output port count23 Apr 2026US 2026/0110847 A1Lumentum Operations LLC
- End-capped optical fiber, fiber array, light source device, and wavelength beam combining device2 Apr 2026US 2026/0093068 A1Nichia Corporation
- Wavelength selective switch and related optical device15 Jan 2026US 2026/0016637 A1Huawei Technologies Co., Ltd.
Most cited
By later US patents
- Broadband light source system and method and light source combiner281US 6,570,659 B2LightLab Imaging, Inc. · 2003
- Wavelength-selective optical add/drop using tilting micro-mirrors256US 5,960,133 ATellium, Inc. · 1999
- Micro-mechanical, anti-reflection, switched optical modulator array and fabrication method228US 5,943,158 ALucent Technologies Inc. · 1999
- Alternating sequential half duplex communication system218US 4,979,170 AQUALCOMM Incorporated · 1990
- Frequency-selective optical switch employing a frequency dispersive element, polarization dispersive element and polarization modulating elements208US 5,414,540 ABell Communications Research, Inc. · 1995