Hazardous area lighting with emergency power back up and wireless communications
US-12422116-B2 · Sep 23, 2025 · US
using a supplementary light source for emergency lighting
using a supplementary light source for emergency lighting · 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 | F21S9/024 |
| Official title | {using a supplementary light source for emergency lighting} |
| Display label | using a supplementary light source for emergency lighting |
| Total patents | 34 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 3 |
| 2017 | 2 |
| 2018 | 3 |
| 2019 | 3 |
| 2020 | 8 |
| 2021 | 6 |
| 2022 | 3 |
| 2023 | 1 |
| 2024 | 2 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Internal lighting module
US-2024426441-A1 · Dec 26, 2024 · US
Hazardous Area Lighting with Emergency Power Back Up and Wireless Communications
US-2024191850-A1 · Jun 13, 2024 · US
Light fixture with backup battery
US-11835200-B2 · Dec 5, 2023 · US
Light fixture with backup battery
US-2022154898-A1 · May 19, 2022 · US
Self-diagnostic fault identification system for emergency lighting unit
US-2022158467-A1 · May 19, 2022 · US
Self-diagnostic fault identification system for emergency lighting unit
US-11223219-B2 · Jan 11, 2022 · US
Battery backup for lighting system
US-11209139-B1 · Dec 28, 2021 · US
Uniformly lit planar field of illumination
US-11149936-B2 · Oct 19, 2021 · US
Uniformly lit planar field of illumination
US-2021254820-A1 · Aug 19, 2021 · US
Notification device for a surface of a building interior
US-10989368-B2 · Apr 27, 2021 · US
Water-resistant extruded housing for emergency lighting component
US-10941932-B1 · Mar 9, 2021 · US
Front access battery compartment
US-2021003262-A1 · Jan 7, 2021 · US
Self-diagnostic fault identification system for emergency lighting unit
US-2020408374-A1 · Dec 31, 2020 · US
Battery backup for lighting system
US-10830404-B1 · Nov 10, 2020 · US
Wireless lighting system for aircraft evacuation systems
US-10807736-B2 · Oct 20, 2020 · US
Front access battery compartment
US-10775010-B2 · Sep 15, 2020 · US
Self-diagnostic fault identification system for emergency lighting unit
US-10775009-B2 · Sep 15, 2020 · US
Wireless lighting system for aircraft evacuation systems
US-2020262580-A1 · Aug 20, 2020 · US
Notification device for a surface of a builiding interior
US-2020124239-A1 · Apr 23, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F21S9/024?
- CPC F21S9/024 is the Cooperative Patent Classification code for “using a supplementary light source for emergency lighting.”
- How many patents are filed under CPC F21S9/024 (using a supplementary light source for emergency lighting)?
- Our database includes 34 publications tagged with this CPC code.
- Is patent activity under CPC F21S9/024 growing?
- Publication counts under this code: 2 in 2024 vs 1 in 2025 (latest complete years).