Surface Light Emitting Module for LED Light Source, Vehicle Lamp Using the Same, and Method of Assembling the Same
US-2020408379-A1 · Dec 31, 2020 · US
Two or more successive light guides
Two or more successive light guides · Cooperative Patent Classification (CPC)
Engines, pumps, lighting, heating, and mechanical systems.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | F21S43/252 |
| Official title | {Two or more successive light guides} |
| Display label | Two or more successive light guides |
| Total patents | 296 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2016 | 1 |
| 2017 | 8 |
| 2018 | 3 |
| 2019 | 20 |
| 2020 | 65 |
| 2021 | 77 |
| 2022 | 67 |
| 2023 | 25 |
| 2024 | 14 |
| 2025 | 14 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Air flap apparatus having integrated light guides, for a motor vehicle
US-10870344-B2 · Dec 22, 2020 · US
Lighting device and lamp for automobile including same
US-10859226-B2 · Dec 8, 2020 · US
Light guiding element, light guiding device, and lighting module
US-10816156-B2 · Oct 27, 2020 · US
Vehicle lamp
US-10816159-B2 · Oct 27, 2020 · US
Vehicular illumination device
US-10816157-B2 · Oct 27, 2020 · US
Light-guiding optical system, especially for motor vehicles
US-10787111-B2 · Sep 29, 2020 · US
Lighting unit for a light device of a motor vehicle and a light device with the lighting unit
US-2020300434-A1 · Sep 24, 2020 · US
Lamp and vehicle having same
US-2020292147-A1 · Sep 17, 2020 · US
Vehicle lamp
US-10760757-B2 · Sep 1, 2020 · US
Improved comfort of outdoor luminaires due to phyllotactic arrangement of led sources
US-2020263854-A1 · Aug 20, 2020 · US
Lighting apparatus
US-2020256535-A1 · Aug 13, 2020 · US
A light device of a motor vehicle
US-2020256539-A1 · Aug 13, 2020 · US
Vehicle lamp having a plate shaped light guide body
US-10731821-B2 · Aug 4, 2020 · US
Position light-integrated blinker apparatus
US-2020231238-A1 · Jul 23, 2020 · US
Lighting apparatus for vehicles
US-2020224845-A1 · Jul 16, 2020 · US
Lamp and vehicle having same
US-10711970-B2 · Jul 14, 2020 · US
Optical module for a motor vehicle
US-2020182427-A1 · Jun 11, 2020 · US
Lamp for vehicle
US-10634307-B2 · Apr 28, 2020 · US
Light emitting device
US-10634300-B2 · Apr 28, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F21S43/252?
- CPC F21S43/252 is the Cooperative Patent Classification code for “Two or more successive light guides.”
- How many patents are filed under CPC F21S43/252 (Two or more successive light guides)?
- Our database includes 296 publications tagged with this CPC code.
- Is patent activity under CPC F21S43/252 growing?
- Publication counts under this code: 14 in 2024 vs 14 in 2025 (latest complete years).