Illumination device
US-12429191-B2 · Sep 30, 2025 · US
of refractors
of refractors · 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 | F21V29/504 |
| Official title | of refractors |
| Display label | of refractors |
| Total patents | 55 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 6 |
| 2016 | 4 |
| 2017 | 6 |
| 2018 | 10 |
| 2019 | 11 |
| 2020 | 3 |
| 2021 | 2 |
| 2022 | 2 |
| 2023 | 3 |
| 2024 | 5 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Light head with auxiliary heat dissipation and stage light fixture having same
US-12320513-B2 · Jun 3, 2025 · US
Light head with auxiliary heat dissipation and stage light fixture having same
US-2025003582-A1 · Jan 2, 2025 · US
Optical arrangement for collimated light beam
US-2024167664-A1 · May 23, 2024 · US
Optical arrangement for collimated light beam
US-11988374-B1 · May 21, 2024 · US
LED lamp
US-11976804-B1 · May 7, 2024 · US
Illumination device
US-2024084998-A1 · Mar 14, 2024 · US
Compact laser beam combiner with micro-prism reflector
US-11892143-B2 · Feb 6, 2024 · US
Stage light with defogging device
US-11662088-B1 · May 30, 2023 · US
Vehicle lamp illumination module, vehicle lamp and vehicle
US-11629831-B2 · Apr 18, 2023 · US
Compact laser beam combiner with micro-prism reflector
US-2023016179-A1 · Jan 19, 2023 · US
Improved thermal management in laser-based lighting using a truncated ball lens
US-2022221129-A1 · Jul 14, 2022 · US
Vehicle lamp illumination module, vehicle lamp and vehicle
US-2022065416-A1 · Mar 3, 2022 · US
Two stage optic for LED devices
US-11112089-B2 · Sep 7, 2021 · US
Lighting device
US-11022292-B2 · Jun 1, 2021 · US
Two stage optic for led devices
US-2020408387-A1 · Dec 31, 2020 · US
Optical module
US-10788631-B2 · Sep 29, 2020 · US
Optical module
US-10575382-B2 · Feb 25, 2020 · US
Lighting device
US-2019316768-A1 · Oct 17, 2019 · US
Optical module
US-10440799-B2 · Oct 8, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F21V29/504?
- CPC F21V29/504 is the Cooperative Patent Classification code for “of refractors.”
- How many patents are filed under CPC F21V29/504 (of refractors)?
- Our database includes 55 publications tagged with this CPC code.
- Is patent activity under CPC F21V29/504 growing?
- Publication counts under this code: 5 in 2024 vs 3 in 2025 (latest complete years).