Light-out detection for wayside signals
US-12196608-B2 · Jan 14, 2025 · US
This page is not indexed by search engines while we improve data quality.
electric
electric · 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 | B61L9/04 |
| Official title | electric |
| Display label | electric |
| Total patents | 19 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2017 | 2 |
| 2018 | 2 |
| 2019 | 2 |
| 2020 | 5 |
| 2021 | 4 |
| 2024 | 2 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Light-out detection for wayside signals
US-2024393168-A1 · Nov 28, 2024 · US
System and method for monitoring a railroad grade crossing
US-12054185-B2 · Aug 6, 2024 · US
Systems and methods for controlling railroad highway crossing flashers
US-11208131-B2 · Dec 28, 2021 · US
Optical system for a LED signal and wayside LED signal
US-11155285-B2 · Oct 26, 2021 · US
Broken wheel detection system
US-11142230-B2 · Oct 12, 2021 · US
System and method for monitoring a railroad grade crossing
US-2021061328-A1 · Mar 4, 2021 · US
Broken Wheel Detection System
US-2020369302-A1 · Nov 26, 2020 · US
Systems and methods for controlling railroad highway crossing flashers
US-2020346676-A1 · Nov 5, 2020 · US
Broken wheel detection system
US-10723373-B2 · Jul 28, 2020 · US
Broken Wheel Detection System
US-2020055531-A1 · Feb 20, 2020 · US
Auto aligning module for lighting application
US-10557617-B2 · Feb 11, 2020 · US
Optical system for a led signal and wayside led signal
US-2019329803-A1 · Oct 31, 2019 · US
Broken wheel detection system
US-10435052-B2 · Oct 8, 2019 · US
Broken Wheel Detection System
US-2018237041-A1 · Aug 23, 2018 · US
Auto aligning module for lighting application
US-2018023786-A1 · Jan 25, 2018 · US
Mechanized Signal Mast
US-2017291619-A1 · Oct 12, 2017 · US
Sub-assembly for searchlight signal, and associated assembly
US-9622311-B1 · Apr 11, 2017 · US
System and method for monitoring power consumption of an led lamp
US-2015160275-A1 · Jun 11, 2015 · US