Electrochromic element
US-10151958-B2 · Dec 11, 2018 · US
Variable attenuator
Variable attenuator · Cooperative Patent Classification (CPC)
Computing, optics, measurement, and control technologies.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | G02F2203/48 |
| Official title | Variable attenuator |
| Display label | Variable attenuator |
| Total patents | 446 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 9 |
| 2016 | 8 |
| 2017 | 14 |
| 2018 | 29 |
| 2019 | 46 |
| 2020 | 49 |
| 2021 | 53 |
| 2022 | 58 |
| 2023 | 78 |
| 2024 | 69 |
| 2025 | 26 |
| 2026 | 7 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Projection using liquid crystal polarization gratings to modulate light
US-2018341139-A1 · Nov 29, 2018 · US
Electrochromic device and imaging apparatus
US-2018341162-A1 · Nov 29, 2018 · US
Optical attenuator
US-2018341129-A1 · Nov 29, 2018 · US
Laser apparatus and extreme ultraviolet light generating system
US-2018342849-A1 · Nov 29, 2018 · US
Device for regulating the passage of energy
US-10114264-B2 · Oct 30, 2018 · US
Device for regulating the passage of energy
US-10108058-B2 · Oct 23, 2018 · US
Optical assembly, optical device, and manufacturing method thereof
US-2018299708-A1 · Oct 18, 2018 · US
Switchable imager lens cover
US-2018284573-A1 · Oct 4, 2018 · US
Microwave photonic notch filter
US-10084542-B2 · Sep 25, 2018 · US
Light valve and display device
US-2018267292-A1 · Sep 20, 2018 · US
Smart window system and control method therefor
US-2018259804-A1 · Sep 13, 2018 · US
Graphene-based plasmonic slot electro-optical modulator
US-2018246350-A1 · Aug 30, 2018 · US
Display device
US-2018226036-A1 · Aug 9, 2018 · US
Plateau-based control of the transmission of a variable transmission lens
US-2018210236-A1 · Jul 26, 2018 · US
Optical transmitting apparatus and optical level control method
US-2018180909-A1 · Jun 28, 2018 · US
Light valve and display device
US-10007107-B2 · Jun 26, 2018 · US
Compact, energy efficient mach-zehnder interferometers and optical attenuators
US-2018173024-A1 · Jun 21, 2018 · US
Planar optical phase shifters with efficient heater placement
US-2018173025-A1 · Jun 21, 2018 · US
Microwave photonic notch filter
US-2018173022-A1 · Jun 21, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC G02F2203/48?
- CPC G02F2203/48 is the Cooperative Patent Classification code for “Variable attenuator.”
- How many patents are filed under CPC G02F2203/48 (Variable attenuator)?
- Our database includes 446 publications tagged with this CPC code.
- Is patent activity under CPC G02F2203/48 growing?
- Publication counts under this code: 69 in 2024 vs 26 in 2025 (latest complete years).