Method and device for outputting an acoustic warning signal of a rail vehicle and warning system for a rail vehicle
US-9815485-B2 · Nov 14, 2017 · US
Control, warning or like safety means along the route or between vehicles or trains
Control, warning or like safety means along the route or between vehicles or trains · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B61L23/00 |
| Official title | Control, warning or like safety means along the route or between vehicles or trains |
| Display label | Control, warning or like safety means along the route or between vehicles or trains |
| Total patents | 254 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 20 |
| 2016 | 23 |
| 2017 | 33 |
| 2018 | 22 |
| 2019 | 24 |
| 2020 | 33 |
| 2021 | 14 |
| 2022 | 18 |
| 2023 | 21 |
| 2024 | 22 |
| 2025 | 15 |
| 2026 | 9 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
System and method for displaying planned speed values
US-9778056-B2 · Oct 3, 2017 · US
Fault diagnosis apparatus for brake of train and automatic train operation equipment due to the reduction braking performance using the same and fault diagnosis method for brake of train
US-2017278319-A1 · Sep 28, 2017 · US
Hazardous Event Alert Systems and Methods
US-2017253258-A1 · Sep 7, 2017 · US
Remote locomotive access detection
US-2017253259-A1 · Sep 7, 2017 · US
Ground-based mobile maintenance facilities for unmanned aerial vehicles
US-9718564-B1 · Aug 1, 2017 · US
System and method employing joint bypass circuit to test insulated joints in track systems
US-9689911-B2 · Jun 27, 2017 · US
Systems and methods for safety locking of operator control units for remote control machines
US-2017151969-A1 · Jun 1, 2017 · US
System and method for monitoring coupler fatigue
US-2017151965-A1 · Jun 1, 2017 · US
Railway safety critical systems with task redundancy and asymmetric communications capability
US-2017129515-A1 · May 11, 2017 · US
Method for monitoring a vehicle control
US-2017124786-A1 · May 4, 2017 · US
Remotely arming head of train device to end of train device
US-2017088153-A1 · Mar 30, 2017 · US
System for monitoring operation of a locomotive
US-2017072972-A1 · Mar 16, 2017 · US
Method for operating a rail vehicle in a railway system and railway system
US-9580092-B2 · Feb 28, 2017 · US
Track collision avoidance control system
US-9569969-B2 · Feb 14, 2017 · US
Standstill determination in a rail vehicle
US-9555821-B2 · Jan 31, 2017 · US
Device and Method for Identifying Obstacles for Rail Vehicles
US-2017016758-A1 · Jan 19, 2017 · US
Instrumented rail system
US-2016368510-A1 · Dec 22, 2016 · US
Travel control device, vehicle, traffic system, control method, and program
US-2016332647-A1 · Nov 17, 2016 · US
Powerless vehicle movement detector
US-9470706-B2 · Oct 18, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B61L23/00?
- CPC B61L23/00 is the Cooperative Patent Classification code for “Control, warning or like safety means along the route or between vehicles or trains.”
- How many patents are filed under CPC B61L23/00 (Control, warning or like safety means along the route or between vehicles or trains)?
- Our database includes 254 publications tagged with this CPC code.
- Is patent activity under CPC B61L23/00 growing?
- Publication counts under this code: 22 in 2024 vs 15 in 2025 (latest complete years).