Monitoring system, wayside LED signal, and method for monitoring a wayside LED signal
US-11161532-B2 · Nov 2, 2021 · US
Safety arrangements for preventing or indicating malfunction of the device, e.g. by leakage current, by lightning
Safety arrangements for preventing or indicating malfunction of the device, e.g. by leakage current, by lightning · 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 | B61L1/20 |
| Official title | Safety arrangements for preventing or indicating malfunction of the device, e.g. by leakage current, by lightning |
| Display label | Safety arrangements for preventing or indicating malfunction of the device, e.g. by leakage current, by lightning |
| Total patents | 73 |
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 | 8 |
| 2016 | 7 |
| 2017 | 7 |
| 2018 | 12 |
| 2019 | 9 |
| 2020 | 7 |
| 2021 | 11 |
| 2022 | 9 |
| 2023 | 2 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method, system, and software code for calibration of rail track circuits, and related rail track circuit
US-11148690-B2 · Oct 19, 2021 · US
Distributed fibre optic sensing for in-train forces monitoring
US-11130510-B2 · Sep 28, 2021 · US
Route monitoring system and method
US-11124210-B2 · Sep 21, 2021 · US
Track circuit surge protection
US-2021237783-A1 · Aug 5, 2021 · US
Remote sensor arrangement
US-2021165021-A1 · Jun 3, 2021 · US
Modular railroad track simulator
US-2021146980-A1 · May 20, 2021 · US
Abnormality detection device, abnormality detection method, and program
US-10953900-B2 · Mar 23, 2021 · US
Optic fibre sensing
US-10928546-B2 · Feb 23, 2021 · US
Device for displaying a course of a process of at least one railway safety unit, and railway safety system having such a device
US-2021001904-A1 · Jan 7, 2021 · US
Magnetic rail shunt with variable resistor
US-10822003-B2 · Nov 3, 2020 · US
Method and device for displaying a course of a process of at least one railway safety unit, and railway safety system having such a device
US-10814895-B2 · Oct 27, 2020 · US
Method, system, and software code for calibration of rail track circuits, and related rail track circuit
US-2020307660-A1 · Oct 1, 2020 · US
Detection of dynamic train-to-rail shunting performance
US-10780903-B2 · Sep 22, 2020 · US
Rail cooling system and method for reducing thermal expansion
US-10753654-B2 · Aug 25, 2020 · US
Railroad track powered measurement device and railroad measurement system
US-10710616-B2 · Jul 14, 2020 · US
Method and system for health assessment of a track circuit and/or of a track section
US-2020156674-A1 · May 21, 2020 · US
Method and arrangement for fault detection in a switch system
US-2019329807-A1 · Oct 31, 2019 · US
Led shielding and monitoring system and wayside led signals
US-2019329802-A1 · Oct 31, 2019 · US
Sensor Device And Method For Checking A Rail Section
US-2019323528-A1 · Oct 24, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B61L1/20?
- CPC B61L1/20 is the Cooperative Patent Classification code for “Safety arrangements for preventing or indicating malfunction of the device, e.g. by leakage current, by lightning.”
- How many patents are filed under CPC B61L1/20 (Safety arrangements for preventing or indicating malfunction of the device, e.g. by leakage current, by lightning)?
- Our database includes 73 publications tagged with this CPC code.
- Is patent activity under CPC B61L1/20 growing?
- Publication counts under this code: 2 in 2023 vs 1 in 2025 (latest complete years).