G02F 2203/48
Variable attenuator
G02F2203/48 (Variable attenuator) appears on 425 US grants and 462 published applications in this corpus.
Search patents in G02F- Granted patents
- 425
- Published applications
- 462
- Assignees
- 294
- Inventors
- 1,124
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 8 | 0 |
| 2000 | 7 | 0 |
| 2001 | 11 | 2 |
| 2002 | 13 | 31 |
| 2003 | 20 | 27 |
| 2004 | 18 | 32 |
| 2005 | 22 | 24 |
| 2006 | 24 | 10 |
| 2007 | 12 | 9 |
| 2008 | 12 | 5 |
| 2009 | 5 | 3 |
| 2010 | 3 | 4 |
| 2011 | 1 | 3 |
| 2012 | 2 | 5 |
| 2013 | 9 | 5 |
| 2014 | 2 | 5 |
| 2015 | 8 | 6 |
| 2016 | 3 | 7 |
| 2017 | 8 | 17 |
| 2018 | 11 | 22 |
| 2019 | 21 | 33 |
| 2020 | 22 | 30 |
| 2021 | 30 | 34 |
| 2022 | 28 | 41 |
| 2023 | 38 | 53 |
| 2024 | 45 | 32 |
| 2025 | 21 | 12 |
| 2026 | 13 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Waveguide structure and method for forming the same18 Aug 2026US 12,710,671 B2Taiwan Semiconductor Manufacturing Company.Ltd
- Light control panel, display module, and display apparatus7 Jul 2026US 12,675,012 B2Boe Technology Group Co., Ltd.
- Dynamic vision sensing system with a static capturing mode2 Jun 2026US 12,647,678 B2Hong Kong Applied Science and Technology Research Institute Company Limited
- Multi-sensor synergy12 May 2026US 12,625,409 B2View Operating Corporation
- Systems and methods of sensor calibration using switchable in-path optical diffuser28 Apr 2026US 12,613,132 B2BAE Systems Space & Mission Systems Inc.
- Waveguide structure and method for forming the same8 Oct 2026US 2026/0310012 A1Taiwan Semiconductor Manufacturing Company.Ltd
- Monolithic Semiconductor-Based Optically Addressable Light Valve30 Jul 2026US 2026/0219537 A1Seurat Technologies, Inc.
- Absorber or scatter assisted variable optical attenuator30 Jul 2026US 2026/0219544 A1Cisco Technology, Inc.
- Curved optical devices, and methods for making same2 Jul 2026US 2026/0186352 A1Alphamicron Incorporated
- Liquid crystal light modulating device30 Apr 2026US 2026/0118729 A1Smart Liquid Crystal Technologies Co., Ltd.
Most cited
By later US patents
- Reflective optically active diffractive device217US 5,825,448 AKent State University · 1998
- System and method for varying the reflectance or transmittance of light162US 7,411,637 B2ELOP Electro-Optics Industries Ltd. · 2008
- Optical attenuator using polarization modulation and a feedback controller88US 5,963,291 AChorum Technologies LP · 1999
- Variable optical attenuator systems88US 7,333,685 B2Avago Technologies Fiber IP (Singapore) Pte. Ltd. · 2008
- Electrochromic devices82US 6,906,842 B2Magna Donnelly Corporation · 2005