Transport facility
US-12534954-B2 · Jan 27, 2026 · US
for tunnels
for tunnels · Cooperative Patent Classification (CPC)
Agriculture, food, personal care, health, and life sciences.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | A62C3/0221 |
| Official title | {for tunnels} |
| Display label | for tunnels |
| Total patents | 25 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 4 |
| 2017 | 3 |
| 2018 | 1 |
| 2019 | 3 |
| 2020 | 1 |
| 2021 | 2 |
| 2022 | 2 |
| 2023 | 4 |
| 2024 | 1 |
| 2025 | 2 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Unitized regenerative fuel cell system for tunnel and method for controlling the same
US-12355124-B2 · Jul 8, 2025 · US
Mobile liquid nitrogen fire extinguishing system and method for utility tunnel
US-12324939-B2 · Jun 10, 2025 · US
Transport Facility
US-2024301747-A1 · Sep 12, 2024 · US
Mobile liquid nitrogen fire extinguishing system and method for utility tunnel
US-2023241431-A1 · Aug 3, 2023 · US
Multi-dimensional space load and fire test system for tunnel structure, and method for implementing same
US-11650135-B2 · May 16, 2023 · US
Multi-dimensional space load and fire test system for tunnel structure, and method for implementing same
US-2023122718-A1 · Apr 20, 2023 · US
Unitized regenerative fuel cell system for tunnel and method for controlling the same
US-2023037065-A1 · Feb 2, 2023 · US
On-track work- or rescue vehicle
US-11453419-B2 · Sep 27, 2022 · US
Fire test system and method for tunnel structure based on real-time fusion of numerical and physical spaces
US-11442418-B2 · Sep 13, 2022 · US
Fire test system and method for tunnel structure based on real-time fusion of numerical and physical spaces
US-2021208554-A1 · Jul 8, 2021 · US
Unmanned vehicle, system, and method for initiating a fire extinguishing action
US-11009877-B2 · May 18, 2021 · US
Control system for use during tunnel fire
US-2020391059-A1 · Dec 17, 2020 · US
On-Track Work- or Rescue Vehicle
US-2019389492-A1 · Dec 26, 2019 · US
Unmanned Vehicle, System and Method for Initiating a Fire Extinguishing Action
US-2019314657-A1 · Oct 17, 2019 · US
Unmanned Vehicle, System, and Method for Initiating a Fire Extinguishing Action
US-2019294165-A1 · Sep 26, 2019 · US
Fire extinguishing equipment
US-9937369-B2 · Apr 10, 2018 · US
Tunnel fire protection system
US-9849316-B2 · Dec 26, 2017 · US
Tunnel Fire Protection System
US-2017189729-A1 · Jul 6, 2017 · US
Tunnel fire protection system
US-9636532-B2 · May 2, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC A62C3/0221?
- CPC A62C3/0221 is the Cooperative Patent Classification code for “for tunnels.”
- How many patents are filed under CPC A62C3/0221 (for tunnels)?
- Our database includes 25 publications tagged with this CPC code.
- Is patent activity under CPC A62C3/0221 growing?
- Publication counts under this code: 1 in 2024 vs 2 in 2025 (latest complete years).